In the recent versions of this great tool, when doing a 'Grab Selected Region', the addition of the visible 'sub zoom window' that shows the pixels of where the cursor is terrific.
What I miss is the ability to fine-tune the capture within this window.
When this sub window is up, holding down the mouse button to start the selection....
One could then use the arrow keys (up/down/left/right) to then finely move the actual capture point one pixel at a time.
This would be effective both for the 'beginning point' and the 'ending point' of the selection to capture.
This ability would allow the very precise and exact pixel location to be selected.