I am using Picard for tagging, and when I do so, I can keep one hand on my mouse and one on the keyboard to make things go fast. Mouse for drag and drop, keyboard for scan/save (ctrl-y and ctrl-r). To make things go a bit more smooth, could you add something like ctrl-d (for delete) as a shortcut for remove? Or anything else that is in reach of the left hand on a normal QWERTY keyboard? Alternatively, let us define shortcuts (but that’s surely way more work).