I always use
- the function "Gerissene Kanten" (torn edges) for my screenshots
This requires me always
- to go via the editor,
- select and click that function
- copy action to clipboard, or save action to file, or send action to imgur
My wish and suggestion is
to have a prestored "post-processor", or call it "finisher"
which always - in my case - adds the "torn edges" just before producing the final screenshot.
P.S. Greenshot is really a "hot program", I like it so much and will donate.