Nice OSX tip: creating an image with a desktop snapshot without scripting

[David Bovill]

Perhaps the coolest, most-secret hidden capture shortcut is
Control-Command-Shift-3 (or 4), which, instead of creating a file on your
desktop, copies the capture into your Clipboard memory, so you can paste it
where you want.

   1. Press Control-Command-Shift-3 (or 4) from any application
   2. Switch to Revolution and in the stack you want the image - just paste!

It's all about that control key :)