i just recently bought my first mac, a powerbook running tiger. Naturally, the laptop keyboard has no print screen key, so how can I take a screenshot into the clipboard?

The following keys Cmd-Shift-4-Space will allow you to take a picture of any particular window open or the desktop, and save it to the desktop.
When you press the keys, a camera will pop up, just move it to the screen that you want the pic of.

Hi,

On my Macs, it has always been Apple-Shift-3 to make the picture. I do wish OS X would leave the picture in .pict format instead of converting it to .pdf though.

Christian