Windows has this builtin capability to make freeform screenshots via Windows-Shift-S. The image illustrates what I mean by freeform: Draw a polygon on screen and only capture that.
As far as I know, nothing on Linux provides this capability. Shutter is generally considered the most advanced screenshot app but it can only do "rectangular" areas.
Maybe I missed some app though?
Workaround: rectangular screenshot, paste to gimp (or similar), freeform select the copy, paste where you want.
Right. I’m using this for war gaming under some time pressure. So I’m looking to optimize. A detour to Gimp means at least double the time.