If you pick an item by mistake — or a scanner fires twice — you can un-pick it at any time using the [−] button on the action bar.
The pick tri-control
The action bar shows [−] count/total Picked [+] throughout the pick flow:
Tap [+] to pick one unit (or confirm a scan)
Tap [−] to un-pick one unit — even if the item was already marked as done
Long-press either end to open a quantity entry field for bulk corrections
In Pick list mode, each row has its own [−] [+] counter so you can correct any item independently.
Correcting in Required scan mode
When scan verification is set to Required, the [+] button is disabled — you must scan the item to add it. However, [−] is always active, so you can always correct an over-pick without needing a manager's intervention.
Bulk corrections
Long-press either end of the [−] [+] control to open a quantity entry field. Type the correct count and confirm — the pick total updates immediately.
