First please please please don’t forget not everyone use QWERTY or desktop keyboards.
I suggest an improvment for keyboard shortcuts in the verification tool:
In addition of
Rkeys, add arrow keys to valid/browse images.
Get a little help to remind the shortcuts on the validation screen.
Maybe with a modal that open with a little icon in a corner of the screen.
Verify is a bit painful when you have to zoom out everytime (like birds).
Then introduce a zoom control with shortcut will be appreciated.