Did you simply try Prnt Scr and then paste?

I'm not sure there is a built-in shortcut.

Or you could try a 3rd party software, like FRAPS. Or this, which is the first link google returned:
https://www.gadwin.com/printscreen/

hi

i will try out the link you just sent. The Prt Scr or copy paste technique is useful but takes too much time, so looking for a shortcut way.

crucillant

As I recall it on the original CD-ROM version, PrtScr creates a screenshot in `C:\BlueByte\The Settlers IV\Grab`. I would expect the same to be true on the GOG version.