Tip 1: take a screenshot of the whole screenIf you want to capture the entire screen, use the following key combination:Press Shift + Command (⌘) + 3.The screenshot will appear on your desktop.Tip 2: take a screenshot of 1 windowIf you want to take a screenshot of a specific window that's open, use a different key combination:Press Shift + Command (⌘) + 4.Press the spacebar, which turns your mou..