diff --git a/backend/app/services/counts_query.rb b/backend/app/services/counts_query.rb
index 5dde9b1..07e1adf 100644
--- a/backend/app/services/counts_query.rb
+++ b/backend/app/services/counts_query.rb
@@ -59,17 +59,24 @@ class CountsQuery
   def summary
     expression = axis == 'month' ? "DATE_FORMAT(#{ @table }.created_at, '%Y-%m')" :
                                   "#{ @table }.created_by_user_id"
-    grouped = @scope.group(Arel.sql(expression))
-    sql = grouped.select(Arel.sql("#{ expression } AS group_key")).to_sql
-    groups = @scope.klass.connection.select_value("SELECT COUNT(*) FROM (#{ sql }) counts_groups")
     group_order = axis == 'user' ? 'MAX(counts_actor.name)' : expression
-    expressions = { 'group' => [group_order], 'count' => ['COUNT(*)'] }
-    final = ["(#{ expression }) IS NULL ASC", "#{ expression } ASC"]
-    rows = grouped.order(Arel.sql(order_sql(expressions, final)))
-        .limit(limit).offset((page - 1) * limit).count
-    names = axis == 'user' ? User.where(id: rows.keys.compact).pluck(:id, :name).to_h : {}
+    sql = @scope.group(Arel.sql(expression)).select(Arel.sql(
+        "#{ expression } AS group_key, COUNT(*) AS record_count, " +
+        "#{ group_order } AS group_name")).to_sql
+    connection = @scope.klass.connection
+    source = "FROM (#{ sql }) counts_groups"
+    groups = connection.select_value("SELECT COUNT(*) #{ source }")
+    expressions = { 'group' => ['group_name'], 'count' => ['record_count'] }
+    order = order_sql(expressions, ['group_key IS NULL ASC', 'group_key ASC'])
+    rows = connection.select_all(
+        "SELECT group_key, group_name, record_count #{ source } " +
+        "ORDER BY #{ order } LIMIT #{ limit } OFFSET #{ (page - 1) * limit }")
     { group_count: groups.to_i,
-      groups: rows.map { |key, value| { key:, name: names[key], count: value } } }
+      groups: rows.map do |row|
+        { key: row['group_key'],
+          name: axis == 'user' ? row['group_name'] : nil,
+          count: row['record_count'].to_i }
+      end }
   end
 
   private
@@ -168,9 +175,9 @@ class CountsQuery
     first = timestamp('from')
     last = timestamp('before')
     raise ArgumentError if first && last && first >= last
-    raise ArgumentError unless ['0', '1'].include?(@params.fetch('latest', '0'))
+    raise ArgumentError unless ['0', '1'].include?(@params.fetch('latest', '1'))
 
-    @scope = @scope.where(Arel.sql(latest_expression)) if @params['latest'] == '1'
+    @scope = @scope.where(Arel.sql(latest_expression)) unless @params['latest'] == '0'
     @scope = @scope.where("#{ @table }.created_at >= ?", first) if first
     @scope = @scope.where("#{ @table }.created_at < ?", last) if last
     if @params['resource_id'].present?
diff --git a/frontend/src/components/counts/CountsCellMenu.tsx b/frontend/src/components/counts/CountsCellMenu.tsx
new file mode 100644
index 0000000..9eb51b6
--- /dev/null
+++ b/frontend/src/components/counts/CountsCellMenu.tsx
@@ -0,0 +1,88 @@
+import { useEffect, useLayoutEffect, useRef } from 'react'
+import { createPortal } from 'react-dom'
+
+import { useUITranslation } from '@/lib/useUITranslation'
+
+export type CountsMenuAction = 'copy' | 'copyHeaders' | 'row' | 'column' | 'all'
+
+
+const CountsCellMenu = (
+    { x, y, act, close }: {
+	x: number
+	y: number
+	act: (action: CountsMenuAction) => void
+	close: () => void },
+) => {
+  const root = useRef<HTMLDivElement> (null)
+  const { label, message } = useUITranslation ('counts')
+  useLayoutEffect (() => {
+    const menu = root.current
+    if (menu == null) return
+    const rect = menu.getBoundingClientRect ()
+    menu.style.left = `${Math.max (4, Math.min (x, window.innerWidth - rect.width - 4))}px`
+    menu.style.top = `${Math.max (4, Math.min (y, window.innerHeight - rect.height - 4))}px`
+    menu.querySelector ('button')?.focus ({ preventScroll: true })
+  }, [x, y])
+  useEffect (() => {
+    const outside = (event: Event) => {
+      if (!root.current?.contains (event.target as Node)) close ()
+    }
+    const escape = (event: KeyboardEvent) => {
+      if (event.key === 'Escape')
+      {
+	event.preventDefault ()
+	event.stopPropagation ()
+	close ()
+      }
+    }
+    document.addEventListener ('pointerdown', outside, true)
+    document.addEventListener ('keydown', escape, true)
+    window.addEventListener ('resize', close)
+    document.addEventListener ('scroll', outside, true)
+    return () => {
+      document.removeEventListener ('pointerdown', outside, true)
+      document.removeEventListener ('keydown', escape, true)
+      window.removeEventListener ('resize', close)
+      document.removeEventListener ('scroll', outside, true)
+    }
+  }, [close])
+  const actions: CountsMenuAction[] = ['copy', 'copyHeaders', 'row', 'column', 'all']
+  return createPortal (
+      <div ref={root} role="menu" aria-label={message ('selection.table').text}
+	  className="fixed z-50 min-w-40 rounded border border-slate-400 bg-white
+	      py-1 text-sm text-slate-900 shadow-lg dark:border-slate-600
+	      dark:bg-slate-800 dark:text-slate-100"
+	  style={{ left: x, top: y }} onContextMenu={event => event.preventDefault ()}
+	  onPointerDown={event => event.stopPropagation ()}
+	  onKeyDown={event => {
+	    event.stopPropagation ()
+	    if ((event.ctrlKey || event.metaKey) && event.key.toLowerCase () === 'c')
+	    {
+	      event.preventDefault ()
+	      act ('copy')
+	      return
+	    }
+	    const buttons = Array.from (root.current?.querySelectorAll ('button') ?? [])
+	    const current = buttons.indexOf (document.activeElement as HTMLButtonElement)
+	    if (['ArrowDown', 'ArrowUp', 'Home', 'End'].includes (event.key))
+	    {
+	      event.preventDefault ()
+	      const next = event.key === 'Home' ? 0 : (event.key === 'End' ? buttons.length - 1
+		  : (current + (event.key === 'ArrowDown' ? 1 : -1) + buttons.length)
+		      % buttons.length)
+	      buttons[next]?.focus ()
+	    }
+	    if (event.key === 'Tab') close ()
+	  }}>
+	{actions.map (action => (
+	    <button key={action} type="button" role="menuitem"
+		className="block w-full px-3 py-1 text-left hover:bg-slate-200
+		    hover:text-slate-900 focus:bg-slate-200 focus:text-slate-900
+		    dark:hover:bg-slate-700 dark:hover:text-slate-100
+		    dark:focus:bg-slate-700 dark:focus:text-slate-100"
+		onClick={() => act (action)}>{label (`selection.${action}`)}</button>))}
+      </div>, document.body)
+}
+
+
+export default CountsCellMenu
diff --git a/frontend/src/components/counts/CountsControls.tsx b/frontend/src/components/counts/CountsControls.tsx
index 7ffa0b7..1139ebc 100644
--- a/frontend/src/components/counts/CountsControls.tsx
+++ b/frontend/src/components/counts/CountsControls.tsx
@@ -1,4 +1,4 @@
-import { useId, useState } from 'react'
+import { useEffect, useId, useState } from 'react'
 
 import CountsFieldTree from '@/components/counts/CountsFieldTree'
 import DateTimeField from '@/components/common/DateTimeField'
@@ -14,18 +14,32 @@ import type { CountsResource } from '@/lib/counts'
 
 
 const CountsControls = (
-    { resource, applied, open, setOpen, execute, displayJSON }: {
+    { resource, applied, open, setOpen, execute, displayJSON, reorder }: {
 	resource: CountsResource
 	applied: URLSearchParams
 	open: boolean
 	setOpen: (open: boolean) => void
 	execute: (params: URLSearchParams) => void
-	displayJSON: (enabled: boolean) => void },
+	displayJSON: (enabled: boolean) => void
+	reorder: (value: string) => void },
 ) => {
   const { label, message } = useUITranslation ('counts')
   const locale = useLocale ()
   const id = useId ()
   const [draft, setDraft] = useState (() => new URLSearchParams (applied))
+  const order = applied.get ('order')
+  const nestedJSON = applied.get ('nested_json')
+  useEffect (() => {
+    setDraft (previous => {
+      const next = new URLSearchParams (previous)
+      for (const [key, value] of Object.entries ({ order, nested_json: nestedJSON }))
+      {
+	if (value == null) next.delete (key)
+	else next.set (key, value)
+      }
+      return next
+    })
+  }, [order, nestedJSON])
   const [error, setError] = useState (false)
   const [pending, setPending] = useState (false)
   const mode = draft.get ('mode') ?? 'summary'
@@ -113,12 +127,15 @@ const CountsControls = (
 			    {message (`axes.${axis}`).text}</option>))}
 		    </select>
 		  </label>) : (
-		  <CountsFieldTree resource={resource} params={draft} update={update}/>)}
+		  <CountsFieldTree resource={resource} params={draft} update={(key, value) => {
+		    update (key, value)
+		    if (key === 'order') reorder (value)
+		  }}/>)}
 	    </fieldset>
 	    <fieldset className="min-w-0 space-y-2" data-counts-filters>
 	      <legend className="mb-2 font-semibold">{label ('filters')}</legend>
 	      <label className="flex items-center gap-1">
-		<input type="checkbox" checked={draft.get ('latest') === '1'}
+		<input type="checkbox" checked={draft.get ('latest') !== '0'}
 		    onChange={event => update ('latest', event.target.checked ? '1' : '0')}/>
 		{label ('latestOnly')}
 	      </label>
diff --git a/frontend/src/components/counts/CountsFieldTree.tsx b/frontend/src/components/counts/CountsFieldTree.tsx
index eb12c39..97efc8d 100644
--- a/frontend/src/components/counts/CountsFieldTree.tsx
+++ b/frontend/src/components/counts/CountsFieldTree.tsx
@@ -1,19 +1,33 @@
-import { countChildPaths, fieldsForCounts, selectedCountChildren,
-	 selectedCountColumns } from '@/lib/counts'
+import { DndContext, MouseSensor, TouchSensor, closestCenter,
+	 useDraggable, useDroppable, useSensor, useSensors } from '@dnd-kit/core'
+
+import { countChildPaths, fieldsForCounts, orderedCountFields, reorderCountFields,
+	 selectedCountChildren, selectedCountColumns } from '@/lib/counts'
+import { cn } from '@/lib/utils'
 import { useUITranslation } from '@/lib/useUITranslation'
 
 import type { CountField, CountsResource } from '@/lib/counts'
 
+type BranchProps = {
+    field: CountField
+    path: string
+    enabled: boolean
+    selected: Set<string>
+    params: URLSearchParams
+    select: (path: string, checked: boolean) => void
+    update: (key: string, value: string) => void
+    move: (from: string, to: string) => void
+    previous?: string
+    next?: string }
+
 
 const FieldBranch = (
-    { field, path, enabled, selected, select }: {
-	field: CountField
-	path: string
-	enabled: boolean
-	selected: Set<string>
-	select: (path: string, checked: boolean) => void },
+    { field, path, enabled, selected, params, select, update, move, previous, next }: BranchProps,
 ) => {
-  const { label } = useUITranslation ('counts')
+  const { label, message } = useUITranslation ('counts')
+  const fixed = path === 'thumbnail'
+  const drag = useDraggable ({ id: field.key, disabled: fixed })
+  const drop = useDroppable ({ id: field.key, disabled: fixed })
   const checked = selected.has (path)
   const control = <label className="inline-flex items-center gap-1">
     <input type="checkbox" checked={checked} disabled={!enabled}
@@ -21,15 +35,79 @@ const FieldBranch = (
 	onChange={event => select (path, event.target.checked)}/>
     {label (field.label)}
   </label>
-  return field.children ? (
-      <details className="my-1">
-	<summary className="cursor-pointer">{control}</summary>
-	<div className="ml-4 border-l pl-2 dark:border-slate-700">
-	  {field.children.map (child => (
-	      <FieldBranch key={child.key} field={child} path={`${path}.${child.key}`}
-		  enabled={enabled && checked} selected={selected} select={select}/>))}
+  return (
+      <div ref={drop.setNodeRef} className={cn ('flex items-start gap-1',
+	  drop.isOver && 'outline outline-1 outline-blue-500 dark:outline-blue-400')}>
+	<div ref={drag.setNodeRef} className="flex min-w-0 flex-1 items-start gap-1"
+	    style={drag.transform == null ? undefined : {
+		position: 'relative', zIndex: 1,
+		transform: `translate3d(${drag.transform.x}px, ${drag.transform.y}px, 0)` }}>
+	  {fixed ? <span className="w-6 shrink-0"/> : (
+	      <button type="button" ref={drag.setActivatorNodeRef}
+		  className="mt-1 w-6 shrink-0 cursor-grab touch-none active:cursor-grabbing"
+		  {...drag.attributes} {...drag.listeners}
+		  aria-keyshortcuts="ArrowUp ArrowDown"
+		  aria-label={message ('reorder', { column: message (field.label).text }).text}
+		  lang={message ('reorder').language}
+		  onClick={event => event.stopPropagation ()}
+		  onKeyDown={event => {
+		    if (!['ArrowUp', 'ArrowDown'].includes (event.key)) return
+		    event.preventDefault ()
+		    event.stopPropagation ()
+		    const target = event.key === 'ArrowUp' ? previous : next
+		    if (target != null) move (field.key, target)
+		  }}><span aria-hidden>⠿</span></button>)}
+	  {field.children ? (
+	      <details className="my-1 min-w-0 flex-1">
+		<summary className="cursor-pointer">{control}</summary>
+		<div className="ml-4 border-l pl-2 dark:border-slate-700">
+		  <FieldGroup fields={field.children} path={path} params={params}
+		      enabled={enabled && checked} selected={selected} select={select}
+		      update={update}/>
+		</div>
+	      </details>) : <div className="my-1">{control}</div>}
 	</div>
-      </details>) : <div className="my-1">{control}</div>
+      </div>)
+}
+
+
+const FieldGroup = (
+    { fields, path, params, enabled, selected, select, update }: {
+	fields: CountField[]
+	path: string
+	params: URLSearchParams
+	enabled: boolean
+	selected: Set<string>
+	select: BranchProps['select']
+	update: BranchProps['update'] },
+) => {
+  const { message } = useUITranslation ('counts')
+  const ordered = orderedCountFields (fields, params, path)
+  const movable = ordered.filter (field => path !== '' || field.key !== 'thumbnail')
+  const sensors = useSensors (
+      useSensor (MouseSensor, { activationConstraint: { distance: 4 } }),
+      useSensor (TouchSensor, { activationConstraint: { delay: 350, tolerance: 8 } }))
+  const move = (from: string, to: string) =>
+      update ('order', reorderCountFields (fields, params, path, from, to))
+  return (
+      <DndContext sensors={sensors} collisionDetection={closestCenter}
+	  accessibility={{ announcements: {
+	      onDragStart: () => undefined, onDragOver: () => undefined,
+	      onDragMove: () => undefined,
+	      onDragEnd: () => undefined, onDragCancel: () => undefined },
+	      screenReaderInstructions: { draggable: message ('output').text } }}
+	  onDragEnd={({ active, over }) => {
+	    if (over != null && active.id !== over.id) move (String (active.id), String (over.id))
+	  }}>
+	{ordered.map (field => {
+	  const position = movable.findIndex (item => item.key === field.key)
+	  return <FieldBranch key={field.key} field={field}
+	      path={path ? `${path}.${field.key}` : field.key}
+	      enabled={enabled} selected={selected} params={params}
+	      select={select} update={update} move={move}
+	      previous={movable[position - 1]?.key} next={movable[position + 1]?.key}/>
+	})}
+      </DndContext>)
 }
 
 
@@ -61,9 +139,8 @@ const CountsFieldTree = (
   }
   return (
       <>
-	{fields.map (field => (
-	    <FieldBranch key={field.key} field={field} path={field.key}
-		enabled selected={selected} select={select}/>))}
+	<FieldGroup fields={fields} path="" params={params} enabled selected={selected}
+	    select={select} update={update}/>
 	<p className="mt-2 text-xs">{label ('nested.selection')}</p>
       </>)
 }
diff --git a/frontend/src/components/counts/CountsNestedTable.tsx b/frontend/src/components/counts/CountsNestedTable.tsx
index 753987a..c0d3ace 100644
--- a/frontend/src/components/counts/CountsNestedTable.tsx
+++ b/frontend/src/components/counts/CountsNestedTable.tsx
@@ -3,7 +3,7 @@ import PrefetchLink from '@/components/PrefetchLink'
 import CountsSortHeader from '@/components/counts/CountsSortHeader'
 import CountsSelectableTable from '@/components/counts/CountsSelectableTable'
 import { changeCountSort, readCountSort, selectedCountChildren,
-	 writeCountSort } from '@/lib/counts'
+	 writeCountSort, orderedCountFields } from '@/lib/counts'
 import { countsLogicalName, countsNestedExport,
 	 countsNestedOrder, countsNestedText } from '@/lib/countsDisplay'
 import { useLocale } from '@/lib/useLocale'
@@ -25,7 +25,8 @@ const CountsNestedTable = (
   const { message } = useUITranslation ('counts')
   const locale = useLocale ()
   const selected = selectedCountChildren (params)
-  const columns = fields.filter (field => selected.has (`${path}.${field.key}`))
+  const columns = orderedCountFields (fields, params, path)
+      .filter (field => selected.has (`${path}.${field.key}`))
   const allSorts = readCountSort (params.get ('child_sort'))
   const sorts = allSorts.filter (sort => sort.key.startsWith (`${path}/`))
       .map (sort => ({ ...sort, key: sort.key.slice (path.length + 1) }))
@@ -50,21 +51,19 @@ const CountsNestedTable = (
     return display.text
   }
   return (
-      <details className="w-full min-w-0 max-w-full" open>
-	<summary className="cursor-pointer text-xs" title={message ('nested.toggle').text}>
-	  <LocalisedText language={title.language}>{title.text}</LocalisedText> ({rows.length})
-	</summary>
+      <div className="counts-nested w-full min-w-0 max-w-full">
 	{params.get ('nested_json') === '1' ? (
 	    <pre data-counts-scroll
-		className="mt-1 max-h-72 w-full overflow-auto whitespace-pre-wrap
+		aria-label={title.text} lang={title.language}
+		className="max-h-72 w-full overflow-auto whitespace-pre-wrap
 		    break-words text-xs">
 	      {JSON.stringify (countsNestedExport (rows, fields, path, params, locale), null, 2)}
 	    </pre>) : (columns.length > 0 && rows.length > 0 && (
 	    <div data-counts-scroll
-		className="relative isolate mt-1 max-h-72 w-full min-w-0 overflow-auto">
+		className="relative isolate max-h-72 w-full min-w-0 overflow-auto">
 	      <CountsSelectableTable family={path} columns={columns.map (field => field.key)}
 		  identity={`${path}:${params}`} name={title}
-		  className="border text-xs dark:border-slate-700">
+		  className="text-xs">
 		<thead className="sticky top-0 z-10 bg-background text-foreground
 		    dark:bg-background dark:text-foreground"><tr>
 		  {columns.map (field => (
@@ -101,7 +100,7 @@ const CountsNestedTable = (
 		    </tr>))}</tbody>
 	      </CountsSelectableTable>
 	    </div>))}
-      </details>)
+      </div>)
 }
 
 
diff --git a/frontend/src/components/counts/CountsResults.tsx b/frontend/src/components/counts/CountsResults.tsx
index 6184951..14ee4ca 100644
--- a/frontend/src/components/counts/CountsResults.tsx
+++ b/frontend/src/components/counts/CountsResults.tsx
@@ -8,6 +8,7 @@ import PostThumbnailPreview from '@/components/posts/PostThumbnailPreview'
 import { changeCountSort, countColumns, countsRequestParams, fieldsForCounts,
 	 readCountSort, selectedCountColumns, writeCountSort } from '@/lib/counts'
 import { countsCellCopy, countsCellText, countsImageURL } from '@/lib/countsDisplay'
+import useDialogue from '@/lib/dialogues/useDialogue'
 import { useLocale } from '@/lib/useLocale'
 import { useUITranslation } from '@/lib/useUITranslation'
 
@@ -25,6 +26,7 @@ const CountsResults = (
 ) => {
   const { label, message } = useUITranslation ('counts')
   const locale = useLocale ()
+  const dialogue = useDialogue ()
   const summary = (params.get ('mode') ?? 'summary') === 'summary'
   const axis = params.get ('axis') ?? 'month'
   const columns = selectedCountColumns (resource, params)
@@ -70,8 +72,22 @@ const CountsResults = (
     case 'thumbnail':
       {
 	const url = countsImageURL (row.thumbnailBase)
-	return url == null ? null : <PostThumbnailPreview url={url} className="h-10 w-16"
-	    alt={message ('shared:labels.thumbnail').text} referrerPolicy="no-referrer"/>
+	return url == null ? null : (
+	    <button type="button" className="block" aria-label={message (
+		'shared:labels.thumbnail').text}
+		onClick={event => {
+		  const trigger = event.currentTarget
+		  void dialogue.form ({
+		      title: label ('shared:labels.thumbnail'),
+		      cancelText: label ('shared:dialogue.close'),
+		      size: 'viewport',
+		      body: () => <img src={url} alt={message ('shared:labels.thumbnail').text}
+			  referrerPolicy="no-referrer" className="h-full w-full object-contain"/>
+		  }).then (() => trigger.focus ({ preventScroll: true }))
+		}}>
+	      <PostThumbnailPreview url={url} className="h-10 w-16"
+		  alt={message ('shared:labels.thumbnail').text} referrerPolicy="no-referrer"/>
+	    </button>)
       }
     case 'url':
     case 'thumbnail_base':
@@ -107,7 +123,8 @@ const CountsResults = (
 		  <CountsSortHeader field="count" label={message ('metric')}
 		      sorts={sorts} change={sort}/>
 		</> : columns.map (column => column === 'thumbnail'
-		    ? <th key={column} className="relative px-2 py-1">
+		    ? <th key={column} data-counts-heading={message (countColumns[column]).text}
+			className="relative px-2 py-1">
 			<span className="sr-only">{label (countColumns[column])}</span>
 			<CountsResizeHandle field={column} label={message (countColumns[column])}/>
 		      </th>
diff --git a/frontend/src/components/counts/CountsSelectableTable.tsx b/frontend/src/components/counts/CountsSelectableTable.tsx
index ba669ad..075043e 100644
--- a/frontend/src/components/counts/CountsSelectableTable.tsx
+++ b/frontend/src/components/counts/CountsSelectableTable.tsx
@@ -1,20 +1,20 @@
-import { useEffect, useId, useLayoutEffect, useMemo, useRef, useState } from 'react'
+import { useCallback, useEffect, useId, useLayoutEffect, useMemo, useRef, useState } from 'react'
 
+import CountsCellMenu from '@/components/counts/CountsCellMenu'
+import { countsClipboard, writeCountsClipboard } from '@/lib/countsClipboard'
 import { CountsTableScope, useCountsTableLayout } from '@/lib/countsTableLayout'
 import { cn } from '@/lib/utils'
 import { useUITranslation } from '@/lib/useUITranslation'
 
 import type { ClipboardEvent, ReactNode } from 'react'
 
+import type { CountsMenuAction } from '@/components/counts/CountsCellMenu'
+
 type Point = { row: number; column: number }
 type Selection = { identity: string; anchor: Point; end: Point }
 const interactive = 'a,button,input,select,textarea,summary,[contenteditable],[data-counts-resize]'
 
 
-const escapeHTML = (value: string): string => value.replace (/[&<>"']/g, character =>
-    ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' })[character]!)
-
-
 const cellAt = (table: HTMLTableElement, point: Point) =>
     table.tBodies[0]?.rows[point.row]?.cells[point.column]
 
@@ -34,6 +34,9 @@ const CountsSelectableTable = (
   const touchArmed = useRef (false)
   const touchPress = useRef<{ x: number; y: number
       timer: ReturnType<typeof setTimeout> } | null> (null)
+  const [menu, setMenu] = useState<{ x: number; y: number; point: Point
+      identity: string } | null> (null)
+  const suppressClick = useRef (false)
   const [stored, setStored] = useState<Selection | null> (null)
   const selection = stored?.identity === identity ? stored : null
   const layout = useCountsTableLayout ()
@@ -87,10 +90,19 @@ const CountsSelectableTable = (
     return { row: (cell.parentElement as HTMLTableRowElement).sectionRowIndex,
 	column: (cell as HTMLTableCellElement).cellIndex }
   }
-  const copy = (event: ClipboardEvent<HTMLTableElement>) => {
-    if (bounds == null || root.current == null || document.activeElement !== root.current) return
-    event.preventDefault ()
-    event.stopPropagation ()
+  const closeMenu = useCallback (() => {
+    setMenu (null)
+    root.current?.focus ({ preventScroll: true })
+  }, [])
+  const openMenu = (point: Point, x: number, y: number) => {
+    const inside = bounds != null && point.row >= bounds.top && point.row <= bounds.bottom
+	&& point.column >= bounds.left && point.column <= bounds.right
+    if (inside) setStored (selection)
+    else setStored ({ identity, anchor: point, end: point })
+    setMenu ({ point, x, y, identity })
+  }
+  const clipboard = (headers = false) => {
+    if (bounds == null || root.current == null) return null
     const rows: string[][] = []
     for (let row = bounds.top; row <= bounds.bottom; ++row)
     {
@@ -102,18 +114,50 @@ const CountsSelectableTable = (
       }
       rows.push (values)
     }
-    const text = rows.map (row => row.map (value => {
-      const safe = /^\s*[=+@-]/.test (value) ? `'${value}` : value
-      return `"${safe.replaceAll ('"', '""')}"`
-    }).join ('\t')).join ('\r\n')
-    const html = '<table>' + rows.map (row => '<tr>' + row.map (value =>
-	`<td style="white-space:pre-wrap">${escapeHTML (
-	    /^\s*[=+@-]/.test (value) ? `'${value}` : value)}</td>`).join ('')
-	+ '</tr>').join ('') + '</table>'
-    event.clipboardData.setData ('text/plain', text)
+    if (headers)
+    {
+      const heading = root.current.tHead?.rows[0]
+      rows.unshift (Array.from ({ length: bounds.right - bounds.left + 1 }, (entry, index) => {
+	void entry
+	const cell = heading?.cells[bounds.left + index]
+	return cell?.dataset.countsHeading ?? cell?.textContent ?? ''
+      }))
+    }
+    return countsClipboard (rows, headers)
+  }
+  const menuAction = (action: CountsMenuAction) => {
+    if (menu == null || root.current == null) return
+    if (action === 'copy' || action === 'copyHeaders')
+    {
+      const payload = clipboard (action === 'copyHeaders')
+      if (payload != null) void writeCountsClipboard (payload).catch (error => {
+	console.error (error)
+      })
+    }
+    else
+    {
+      const lastRow = (root.current.tBodies[0]?.rows.length ?? 1) - 1
+      const lastColumn = columns.length - 1
+      const anchor = {
+	  row: action === 'row' ? menu.point.row : 0,
+	  column: action === 'column' ? menu.point.column : 0 }
+      const end = {
+	  row: action === 'row' ? menu.point.row : lastRow,
+	  column: action === 'column' ? menu.point.column : lastColumn }
+      setStored ({ identity, anchor, end })
+    }
+    closeMenu ()
+  }
+  const copy = (event: ClipboardEvent<HTMLTableElement>) => {
+    if (document.activeElement !== root.current) return
+    const payload = clipboard ()
+    if (payload == null) return
+    event.preventDefault ()
+    event.stopPropagation ()
+    event.clipboardData.setData ('text/plain', payload.text)
     try
     {
-      event.clipboardData.setData ('text/html', html)
+      event.clipboardData.setData ('text/html', payload.html)
     }
     catch
     {
@@ -140,10 +184,18 @@ const CountsSelectableTable = (
 		'[&>tbody>tr>td[data-counts-selected]]:outline-blue-500',
 		'[&>tbody>tr>td[data-counts-selected]]:outline-offset-[-1px]', className)}
 	    onCopy={copy}
+	    onClickCapture={event => {
+	      if ((event.target as Element).closest ('table') !== event.currentTarget
+		  || !suppressClick.current) return
+	      event.preventDefault ()
+	      event.stopPropagation ()
+	      suppressClick.current = false
+	    }}
 	    onPointerDown={event => {
 	      const element = event.target as Element
-	      if (element.closest ('table') !== event.currentTarget
-		  || element.closest (interactive) != null || event.button !== 0) return
+	      if (element.closest ('table') !== event.currentTarget) return
+	      suppressClick.current = false
+	      if (element.closest (interactive) != null || event.button !== 0) return
 	      if (element instanceof HTMLElement && element.hasAttribute ('data-counts-scroll'))
 	      {
 		const rect = element.getBoundingClientRect ()
@@ -153,6 +205,7 @@ const CountsSelectableTable = (
 	      const point = pointFor (element)
 	      if (point == null) return
 	      event.stopPropagation ()
+	      setMenu (null)
 	      event.currentTarget.focus ({ preventScroll: true })
 	      setStored ({ identity, anchor: event.shiftKey && selection != null
 		  ? selection.anchor : point, end: point })
@@ -169,6 +222,8 @@ const CountsSelectableTable = (
 		const pointerId = event.pointerId
 		touchPress.current = { x: event.clientX, y: event.clientY,
 		    timer: setTimeout (() => {
+		      suppressClick.current = true
+		      openMenu (point, event.clientX, event.clientY)
 		      dragging.current = true
 		      touchArmed.current = true
 		      table.setPointerCapture (pointerId)
@@ -182,6 +237,10 @@ const CountsSelectableTable = (
 	      if (!dragging.current || event.buttons === 0) return
 	      const point = pointFor (document.elementFromPoint (event.clientX, event.clientY))
 	      if (point == null) return
+	      if (touchArmed.current && touchPress.current != null
+		  && Math.hypot (event.clientX - touchPress.current.x,
+		      event.clientY - touchPress.current.y) <= 8) return
+	      setMenu (null)
 	      event.stopPropagation ()
 	      setStored (previous => previous?.identity !== identity ? previous : {
 		  ...previous, end: point })
@@ -191,10 +250,27 @@ const CountsSelectableTable = (
 	      if (event.target === event.currentTarget) finish ()
 	    }}
 	    onContextMenu={event => {
-	      if (touchPress.current != null || touchArmed.current) event.preventDefault ()
+	      const element = event.target as Element
+	      if (element.closest ('table') !== event.currentTarget) return
+	      const point = pointFor (element)
+	      if (point == null || element.closest ('[data-counts-resize]') != null) return
+	      event.preventDefault ()
+	      event.stopPropagation ()
+	      openMenu (point, event.clientX, event.clientY)
 	    }}
 	    onKeyDown={event => {
 	      if (event.target !== event.currentTarget) return
+	      if (event.key === 'ContextMenu' || (event.shiftKey && event.key === 'F10'))
+	      {
+		const point = selection?.end ?? { row: 0, column: 0 }
+		const rect = cellAt (event.currentTarget, point)?.getBoundingClientRect ()
+		if (rect != null)
+		{
+		  event.preventDefault ()
+		  openMenu (point, rect.left, rect.bottom)
+		}
+		return
+	      }
 	      if (event.key === 'Escape')
 	      {
 		setStored (null)
@@ -221,6 +297,8 @@ const CountsSelectableTable = (
 	      <col key={key} style={{ width: layout.width (family, key) }}/>))}</colgroup>
 	  {children}
 	</table>
+	{menu?.identity === identity && <CountsCellMenu x={menu.x} y={menu.y}
+	    act={menuAction} close={closeMenu}/>}
       </CountsTableScope.Provider>)
 }
 
diff --git a/frontend/src/components/counts/CountsSortHeader.tsx b/frontend/src/components/counts/CountsSortHeader.tsx
index 67711ca..d14b5e8 100644
--- a/frontend/src/components/counts/CountsSortHeader.tsx
+++ b/frontend/src/components/counts/CountsSortHeader.tsx
@@ -36,7 +36,8 @@ const CountsSortHeader = (
       direction: message (`sort.${state}`).text })
 
   return (
-      <th className="relative overflow-hidden whitespace-nowrap px-1 py-1"
+      <th data-counts-heading={label.text}
+	  className="relative overflow-hidden whitespace-nowrap px-1 py-1"
 	  aria-sort={(sorts.length > 1 && priority >= 0) ? 'other' : state}>
 	<Button type="button" variant="ghost" size="sm"
 	    className="h-auto w-full max-w-full justify-start select-none px-1 py-0 pr-3"
diff --git a/frontend/src/components/counts/countsTable.css b/frontend/src/components/counts/countsTable.css
index 1065994..b9106d7 100644
--- a/frontend/src/components/counts/countsTable.css
+++ b/frontend/src/components/counts/countsTable.css
@@ -17,3 +17,29 @@
 .dark .counts-grid > tbody > tr:nth-child(even) > td:not([data-counts-selected]) {
   @apply bg-slate-900 text-slate-100;
 }
+
+.counts-grid > thead {
+  @apply bg-slate-200 text-slate-950;
+}
+
+.counts-grid > thead > tr > th {
+  @apply border-b border-r border-slate-300 bg-slate-200 text-slate-950;
+}
+
+.dark .counts-grid > thead,
+.dark .counts-grid > thead > tr > th {
+  @apply border-slate-600 bg-slate-800 text-slate-50;
+}
+
+.counts-grid > tbody > tr > td {
+  @apply border-r border-slate-200 dark:border-slate-700;
+  -webkit-touch-callout: none;
+}
+
+.counts-grid > tbody > tr > td:has(> .counts-nested) {
+  padding: 0;
+}
+
+.counts-nested {
+  @apply border-l-2 border-slate-300 dark:border-slate-600;
+}
diff --git a/frontend/src/components/dialogues/DialogueProvider.tsx b/frontend/src/components/dialogues/DialogueProvider.tsx
index f8e966f..d9185a5 100644
--- a/frontend/src/components/dialogues/DialogueProvider.tsx
+++ b/frontend/src/components/dialogues/DialogueProvider.tsx
@@ -8,6 +8,7 @@ import { Dialog,
 	 DialogHeader,
 	 DialogTitle } from '@/components/ui/dialog'
 import { DialogueContext } from '@/lib/dialogues/useDialogue'
+import { cn } from '@/lib/utils'
 import { useUITranslation } from '@/lib/useUITranslation'
 
 import type { FC, ReactNode } from 'react'
@@ -183,13 +184,12 @@ const DialogueProvider: FC<Props> = ({ children }) => {
 	      <DialogContent
 		  closeLabel={(active.kind === 'confirm' || active.kind === 'choice')
 		      ? active.options.closeLabel : undefined}
-		  className={
-		      active.kind === 'form'
-		      ? `flex max-h-[calc(100dvh-1rem)] ${ active.options.size === 'large'
-			  ? 'max-w-3xl'
-			  : 'max-w-lg' } flex-col overflow-hidden gap-0`
-		      : 'px-6 pb-6 pt-7'
-		  }
+		  className={cn (active.kind === 'form'
+		      ? 'flex max-h-[calc(100dvh-1rem)] flex-col overflow-hidden gap-0'
+		      : 'px-6 pb-6 pt-7', active.kind === 'form' && (
+		      active.options.size === 'viewport'
+		      ? 'h-[88dvh] w-[88vw] max-w-none'
+		      : (active.options.size === 'large' ? 'max-w-3xl' : 'max-w-lg')))}
 		  onEscapeKeyDown={event => {
 		    if (nestedConfirm?.parentId === active.id || pendingIds.includes (active.id))
 		      event.preventDefault ()
diff --git a/frontend/src/lib/counts.ts b/frontend/src/lib/counts.ts
index def6766..ee3bf67 100644
--- a/frontend/src/lib/counts.ts
+++ b/frontend/src/lib/counts.ts
@@ -102,6 +102,44 @@ export const fieldsForCounts = (resource: CountsResource): CountField[] =>
 	children: nested[key] }))
 
 
+export const orderedCountFields = (
+    fields: CountField[],
+    params: URLSearchParams,
+    parent = '',
+): CountField[] => {
+  const prefix = parent ? `${parent}.` : ''
+  const saved = (params.get ('order') ?? '').split (',')
+  const keys = [...new Set ([...saved, ...fields.map (field => `${prefix}${field.key}`)])]
+  const ordered = keys.flatMap (key => {
+    const field = fields.find (field => `${prefix}${field.key}` === key)
+    return field == null ? [] : [field]
+  })
+  return parent ? ordered : [
+      ...ordered.filter (field => field.key === 'thumbnail'),
+      ...ordered.filter (field => field.key !== 'thumbnail')]
+}
+
+
+export const reorderCountFields = (
+    fields: CountField[],
+    params: URLSearchParams,
+    parent: string,
+    from: string,
+    to: string,
+): string => {
+  const ordered = orderedCountFields (fields, params, parent)
+  const first = ordered.findIndex (field => field.key === from)
+  const last = ordered.findIndex (field => field.key === to)
+  if (first < 0 || last < 0) return params.get ('order') ?? ''
+  const prefix = parent ? `${parent}.` : ''
+  const current = ordered.map (field => `${prefix}${field.key}`)
+  const next = [...current]
+  next.splice (last, 0, ...next.splice (first, 1))
+  return [...(params.get ('order') ?? '').split (',').filter (
+      key => key && !current.includes (key)), ...next].join (',')
+}
+
+
 export const selectedCountColumns = (
     resource: CountsResource,
     params: URLSearchParams,
@@ -110,7 +148,8 @@ export const selectedCountColumns = (
       columnsForCounts (resource).filter (key => ![
 	  'thumbnail', 'original_created_from', 'original_created_before']
 	  .includes (key))
-  return columnsForCounts (resource).filter (key => selected.includes (key))
+  return orderedCountFields (fieldsForCounts (resource), params)
+      .map (field => field.key as CountColumn).filter (key => selected.includes (key))
 }
 
 
@@ -164,14 +203,18 @@ export const normaliseCountsParams = (
   if (!['month', 'user'].includes (params.get ('axis') ?? ''))
     params.set ('axis', 'month')
   if (params.has ('columns'))
-    params.set ('columns', selectedCountColumns (resource, params).join (','))
+  {
+    const selected = new Set (params.get ('columns')!.split (','))
+    params.set ('columns', columnsForCounts (resource).filter (key => selected.has (key))
+	.join (','))
+  }
   return params
 }
 
 
 export const countsRequestParams = (params: URLSearchParams): URLSearchParams => {
   const result = new URLSearchParams (params)
-  for (const key of ['columns', 'children', 'child_sort', 'nested_json'])
+  for (const key of ['columns', 'children', 'child_sort', 'nested_json', 'order'])
     result.delete (key)
   return result
 }
diff --git a/frontend/src/lib/countsClipboard.ts b/frontend/src/lib/countsClipboard.ts
new file mode 100644
index 0000000..1715f88
--- /dev/null
+++ b/frontend/src/lib/countsClipboard.ts
@@ -0,0 +1,70 @@
+export type CountsClipboard = { text: string; html: string }
+
+
+const escapeHTML = (value: string): string => value.replace (/[&<>"']/g, character =>
+    ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' })[character]!)
+
+
+export const countsClipboard = (rows: string[][], headers = false): CountsClipboard => {
+  // Excel accepts quoted TSV fields only when delimiters or quotes require them.
+  // Prefix formula-like text in both representations, including leading whitespace.
+  const safe = rows.map (row => row.map (value => /^\s*[=+@-]/.test (value)
+      ? `'${value}` : value))
+  const text = safe.map (row => row.map (value => /[\t\r\n"]/.test (value)
+      ? `"${value.replaceAll ('"', '""')}"` : value).join ('\t')).join ('\r\n')
+  const html = '<html><body><table>' + safe.map ((row, index) => '<tr>' + row.map (value => {
+    const tag = headers && index === 0 ? 'th' : 'td'
+    // Preserve time strings, leading zeroes, and user text instead of inferring dates/formulae.
+    const numeric = value.length <= 15 && /^(?:0|[1-9]\d*)(?:\.\d+)?$/.test (value)
+    const style = numeric ? 'white-space:pre-wrap' : 'white-space:pre-wrap;mso-number-format:"\\@"'
+    return `<${tag} style="${escapeHTML (style)}">${escapeHTML (value)
+	.replace (/\r\n|\r|\n/g, '<br>')}</${tag}>`
+  }).join ('') + '</tr>').join ('') + '</table></body></html>'
+  return { text, html }
+}
+
+
+export const writeCountsClipboard = async (payload: CountsClipboard): Promise<void> => {
+  if (navigator.clipboard?.write != null && typeof ClipboardItem !== 'undefined')
+  {
+    try
+    {
+      await navigator.clipboard.write ([new ClipboardItem ({
+	  'text/plain': new Blob ([payload.text], { type: 'text/plain' }),
+	  'text/html': new Blob ([payload.html], { type: 'text/html' }) })])
+      return
+    }
+    catch
+    {
+      // Browsers without HTML clipboard support may still permit plain TSV.
+    }
+  }
+  if (navigator.clipboard?.writeText != null)
+  {
+    try
+    {
+      await navigator.clipboard.writeText (payload.text)
+      return
+    }
+    catch
+    {
+      // Try the synchronous copy event when clipboard permission is unavailable.
+    }
+  }
+  // The synchronous copy event fallback is also used on non-secure local origins.
+  const listener = (event: ClipboardEvent) => {
+    event.preventDefault ()
+    event.stopImmediatePropagation ()
+    event.clipboardData?.setData ('text/plain', payload.text)
+    event.clipboardData?.setData ('text/html', payload.html)
+  }
+  document.addEventListener ('copy', listener, true)
+  try
+  {
+    if (!document.execCommand ('copy')) throw new Error ('Clipboard unavailable')
+  }
+  finally
+  {
+    document.removeEventListener ('copy', listener, true)
+  }
+}
diff --git a/frontend/src/lib/countsDisplay.ts b/frontend/src/lib/countsDisplay.ts
index 4d86896..b1c4211 100644
--- a/frontend/src/lib/countsDisplay.ts
+++ b/frontend/src/lib/countsDisplay.ts
@@ -1,4 +1,5 @@
-import { fieldsForCounts, selectedCountChildren, sortedCountChildren } from '@/lib/counts'
+import { fieldsForCounts, orderedCountFields, selectedCountChildren,
+	 sortedCountChildren } from '@/lib/counts'
 import { translateUIMessage } from '@/lib/i18n'
 import { localisedDateString, msToTime, originalCreatedAtString } from '@/lib/utils'
 
@@ -145,7 +146,8 @@ export const countsNestedExport = (
     locale: LocaleCode,
 ): unknown => {
   const selected = selectedCountChildren (params)
-  const columns = fields.filter (field => selected.has (`${path}.${field.key}`))
+  const columns = orderedCountFields (fields, params, path)
+      .filter (field => selected.has (`${path}.${field.key}`))
   if (columns.length === 0) return rows.map (() => ({ }))
   return countsNestedOrder (rows, path, params, locale).map (row =>
       Object.fromEntries (columns.map (field => [
@@ -167,7 +169,8 @@ export const countsNestedText = (
     locale: LocaleCode,
 ): string => {
   const selected = selectedCountChildren (params)
-  const columns = fields.filter (field => selected.has (`${path}.${field.key}`))
+  const columns = orderedCountFields (fields, params, path)
+      .filter (field => selected.has (`${path}.${field.key}`))
   if (columns.length === 0)
     return `${translateUIMessage ('common:countLabel', 'counts', locale).text}: ${rows.length}`
   return countsNestedOrder (rows, path, params, locale).map (row => columns.map (field => {
diff --git a/frontend/src/lib/dialogues/useDialogue.ts b/frontend/src/lib/dialogues/useDialogue.ts
index 0817b54..b9774a2 100644
--- a/frontend/src/lib/dialogues/useDialogue.ts
+++ b/frontend/src/lib/dialogues/useDialogue.ts
@@ -41,7 +41,7 @@ type DialogueFormOptions = { title:         ReactNode
 			     description?:  ReactNode
 			     body:          (controls: DialogueFormControls) => ReactNode
 			     cancelText?:   ReactNode
-			     size?:         'default' | 'large' }
+			     size?:         'default' | 'large' | 'viewport' }
 
 type DialogueAPI =
     { confirm:  (options: ConfirmOptions) => Promise<boolean>
diff --git a/frontend/src/locales/ja/counts.json b/frontend/src/locales/ja/counts.json
index 779aa50..8c291cb 100644
--- a/frontend/src/locales/ja/counts.json
+++ b/frontend/src/locales/ja/counts.json
@@ -57,7 +57,7 @@
   },
   "nested": {
     "toggle": "表内表を展開・折り畳み",
-    "selection": "親を OFF にしても子項目の選択は保持します。子項目がすべて OFF の表は件数のみ表示します。",
+    "selection": "親を OFF にしても子項目の選択は保持します。",
     "noColumns": "出力項目が選択されていません。",
     "asJSON": "内表を JSON 表示"
   },
@@ -74,7 +74,12 @@
   "notRegistered": "名称未登録",
   "selection": {
     "table": "集計・明細表",
-    "hint": "クリックでセル選択、ドラッグまたは Shift＋クリックで範囲選択。タッチではセルを長押ししてドラッグ。Ctrl＋C／Cmd＋C でコピー。矢印キーで移動、Shift＋矢印キーで範囲を拡張、Escape で解除。"
+    "hint": "クリックでセル選択、ドラッグまたは Shift＋クリックで範囲選択。タッチではセルを長押ししてドラッグ。Ctrl＋C／Cmd＋C でコピー。矢印キーで移動、Shift＋矢印キーで範囲を拡張、Escape で解除。",
+    "copy": "コピー",
+    "copyHeaders": "見出し付きコピー",
+    "row": "行を選択",
+    "column": "列を選択",
+    "all": "すべて選択"
   },
   "resize": {
     "column": "{{column}}の列幅を変更。境界をドラッグ、タッチでは長押ししてドラッグ。矢印キーでも調整できます。"
@@ -83,5 +88,6 @@
   "sections": {
     "range": "{{begin}}～{{end}}",
     "separator": "、"
-  }
+  },
+  "reorder": "{{column}}：出力項目の並べ替え"
 }
diff --git a/frontend/src/pages/CountsResourcePage.tsx b/frontend/src/pages/CountsResourcePage.tsx
index 793acc9..bb94fe6 100644
--- a/frontend/src/pages/CountsResourcePage.tsx
+++ b/frontend/src/pages/CountsResourcePage.tsx
@@ -29,6 +29,7 @@ const CountsResourcePage = ({ resource }: { resource: CountsResource }) => {
   const canonical = params.toString ()
   const controlParams = new URLSearchParams (params)
   controlParams.delete ('nested_json')
+  controlParams.delete ('order')
   const request = countsRequestParams (params)
   const [open, setOpen] = useState (false)
   const [sidebarOpen, setSidebarOpen] = useState (false)
@@ -108,6 +109,7 @@ const CountsResourcePage = ({ resource }: { resource: CountsResource }) => {
 	      <CountsControls key={`${resource}:${controlParams}`}
 		  resource={resource} applied={params}
 		  open={open} setOpen={setOpen}
+		  reorder={value => update ('order', value)}
 		  displayJSON={enabled => update ('nested_json', enabled ? '1' : '0')}
 		  execute={next => {
 		    if (next.toString () === canonical) void refetch ()