1. The simple “print screen button” capture:
Press the Apple key ⌘ + Shift + 3 all at the same time
You will find a capture of the screen on your desktop named ‘screenshot _’
2. Capturing a selected portion of your screen:
Press the Apple key ⌘ + Shift + 4 all at the same time
You will see the cursor change to +
Drag a box around the section you want to copy and release the mouse
You will find a capture of the screen on your desktop again entitled ‘screenshot _’
3 . Capturing from a selected application window:
Press the Apple key ⌘ + Shift + 4 all at the same time
You will see the cursor change to +
Press the spacebar
The cursor will change to a camera. Simply click on the window you want to be captured.
Again the capture of the screen will be on your desktop labelled ‘screenshot _’