#434

frontend/src/components/counts/CountsAxes.tsx

@@ -49,9 +49,10 @@ const CountsAxes = ({ params, update }: {
     commit (next)
   }
   return <SortableList groups={groups} name={name} onChange={commit}
-      renderGroup={(id, content) => <fieldset className="mb-2 min-w-0">
+      renderGroup={(id, content, over) => <fieldset className="mb-2 min-w-0">
         <legend>{label (id === 'available' ? 'axisItems' : id)}</legend>
-        <div className="rounded border dark:border-slate-700">{content}</div>
+        <div className={cn ('rounded border dark:border-slate-700',
+	    over && 'ring-1 ring-blue-500 dark:ring-blue-400')}>{content}</div>
       </fieldset>} renderItem={(id, group) => {
         const axis = axes.find (axis => axis.field === id)
 	return <div className={cn ('flex items-center gap-2 text-sm',