screenshot

Please can someone help me out, how do I make a screenshot under lcnc 2.8?
I can not figure it out or it does not work!
none of the keys work: neither
- print
- alt-print
- string-print
- alt-string-print
also under accessories there is nothing for a screenshot!

This program is not included by default.
can be installed with :

(sudo) apt-get install gnome-screenshot

to install it.

at small things you can despair !