Have you tried holding CTRL while selecting a rect area? That should give you a fine-tune window where you can resize the rect with arrow keys. Holding CTRL is optional, the fine-tuning window can be enabled by default.

Yes that's works but my first concern is to be precise with my initial selecting, because I could control with the magnifier.
When the area was drawn, there is no magnifier to see if I've right selected pixels I want.
Example: I want to capture only this icon with it round boxe.

And often, I've some missing part like this (and it took me long time to select first and last point):

This functionality is the only thing I miss from Greenshot. Precise movement with the arrow keys while zoomed in saves having to manually crop screenshots after the fact and is a huge time saver.

Plus 1-ing this.
The ability to enable precision control prior to doing something like starting a highlight would be really useful.

Thanks!

This needs more attention. I just recently stumbled over this great application and this is THE ONE feature I miss. Taking a screenshot and cropping afterwards is just a hassle

Unfortunately I don't have as much private time as I used to have back in the days to invest in this project and almost everything was developed by me. The community needs to step in help out if you want the the project to progress.

Unfortunately I don't have as much private time as I used to have back in the days to invest in this project and almost everything was developed by me. The community needs to step in help out if you want the the project to progress.

Understandable. I'm currently trying to set up a dev environment so I can give it a stab.

As far as I can tell, listening for arrow keys in the keyPressEvent of the AbstractSnippingArea class and then calling the mouseMoveEvent with an updated position should do the trick.

Yes, this sounds like right way. Let me know if you get stuck then I can have a look too.

This has been implemented. Kudos to @SebiAi who implemented the feature.