Taking Screen Shots in Mac

* To take a screen shot of the entire screen, press Command Shift 3.
* To get a crosshair cursor to take a screen shot of just a portion of the screen, press Command Shift 4. Drag over an area.
* To take a screen shot of a selected item, such as an open window, an icon, or the Desktop, press Command Shift 4, then press the Spacebar. The pointer turns into a camera icon that highlights items beneath it, as shown on the left. When the item you want to shoot is highlighted, click the mouse.
* You can take a screen shot that will go straight to the Clipboard (it will not make a Picture file) so you can then just paste it directly into a document or into something like a Photoshop file: Press Command Shift 4 to get the crosshair, then hold down the Control key. Drag over an area. You'll hear a much smaller snapping sound.
Go to your document. If it's a text document, click the insertion point where you want the graphic to paste in. Then press Command V to paste the screen shot onto the page.