I need this improvements.

[iperov]

0. add config file and specify it using --config-file

1. Adjustable color and transparency of the polygon while segmenting. Current green color is very bright.

2. change hot keys closer to operate them by one hand comfortably

For example create polygon or other types set to 1 2 3 4 ...
edit set to ctrl+ 1 2 3 4 ...

OR specify via config file

3. when using zoom ctrl+wheel , better to zoom to current mouse position

4. redo point by ctrl-shift-z

5. hide polygon overlay by pressing and holding ctrl

6. add / remove points after creating the polygon

7. undo after polygon move