Mac OS X - Keyboard Shortcuts for Screen Captures

I had recalled that there were keyboard shortcuts for doing screen captures (instead of always using Grab). The following is from the Apple Help that describes how to do it. The important part is holding down the Control key so that the image goes to the clipboard instead of as a file on the desktop...

Shortcuts for taking pictures of the screen

Use these shortcuts to take pictures of the screen in Mac OS X.

• {Command}-Shift-3

Take a picture of part of the screen

• {Command}-Shift-4, then drag to select the area you want in the picture.
• To cancel, press Escape.

To Take a picture of a window, a menu, the menu bar, or the Dock.

• Press {Command}-Shift-4, then press the Space bar. Move the pointer over the area you want so that it's highlighted, then click.
• To drag to select the area instead, press the Space bar again.
• To cancel, press Escape.

Screen shots are saved as files on the desktop. If you want to put the screen shot in the Clipboard, rather than create a file, hold down the Control key when you press the other keys. You can then paste the picture into a document.

I just needed this in a convenient spot that I could reference later (i.e. here).