Removing the background of photoshop

[Kotik]

I could ask this in the other topic i created but I thought it would be better for users who search for a topic to find the answer easily.

Anyhow, here goes the question. I have some people sending me screenshots of their photoshop layout and one of them dont have this grey background that photoshop has. He had it like see through. You could see the desktop while photoshop was open and was the active window. You could see all the menus and stuff but the main/middle portion was empty. Somebody knows how to customize photoshop like that?

thanks

[Pure_Graphix]

They are running a Macintosh, that's usually how they run by default, i also wondered about this, but i don't think on a windows machine it can be done sorry. hopfully i'm wrong

- pure -