(Keyboard shortcut: 'Command' + 'Z') Click outside the pop-up screen and the screen you want will be captured.

'Screen' to capture the entire screen (Thumbnail #4).

Then click again on the window you want to capture. (Keyboard shortcut: 'Shift' + 'Command' + 'W') When the window you want is ready, you click on 'Choose Window' from the little pop-up screen.

'Window' to capture a window (Thumbnail #3).

Releasing the click bar captures the area you selected. (Keyboard shortcut: 'Shift' + 'Command' + '4') You drag over the portion of the screen you wish to capture.

'Selection' to capture only a part of the screen that you select (Thumbnail #2).

With the 'Grab' program open, from the menu bar, under the 'Capture' pull down menu (Thumbnail #1 below), you can take a screenshot.

Anytime you double click on the 'Grab' icon on your dock, the 'Grab' program will open and you will find its menu bar across the top of your screen.Mac HD => Applications => Utilities => 'Grab' Icon.First, find the program in the Utilities folder on your Mac hard drive.To make this program readily available on your Dock: Grab is a utility program that comes preloaded on Mac computers. Method #2: Grab, a Utility Program in Your Applications File

How to take screenshot on mac pc