If you’re a Mac convert using Parallels to run Windows, you’re probably wondering where the Print Screen (used for screen captures in Windows) OS X is.  Well, unfortunately, there’s no exact keyboard stroke for it; however equivalent; however, you can either use a third-party app like SnagIT, or go the smarter route by using the Windows built-in On-Screen Keyboard tool. 

To access it:

1. Go to Start > Run.

2. Type osk then hit Enter.

If all went well, you should see something like this:

Voila!  You can click the psc key to copy any image (e.g., your desktop) into the [Windows] clipboard, which you can then paste into MS Paint to manipulate to your liking. 

Hope this tip helps.