What about it? Please try to be more specific and use full sentences when asking your questions, or nobody will understand what it is you want to know.
I think the asker meant: "how do we take screenshots in Mass Effect 2?" Unfortunately, ME2 doesn't have a hotkey for this. There are two ways you can do it:
1) Play in windowed mode, hit print screen when you want the shot and copy it into any image editing program (ms paint works).
2) Install Fraps. It's a screen capturing program. And it labels your screenshots too. Yes, it also works with Steam.