osx screen shot on an ibook, anyone know how?

[croc_]

As the title says, my friend has an ibook and she can't figure out how to take a screen shot. I haven't used a mac since the old power pcs.

[Black Hawk]

http://iraszl.brinkster.net/creativebits/2004/07/os-x-screenshot.html

[croc_]

Thank you kind sir.