Hi Bulia,

1. Aborting current segment is done by Backspace. Finishing

the line with last unfinished segment removed is done by Return or double-click.

Apologies for my ignorance of these shortcuts.

2. Your patch totally disables right-click menu in this

tool, even when you don't draw anything. I fixed this and committed the changed patch.

Thanks for the fix and the commit!

Cheers

Carl