You can capture your entire screen or just a selected portion of it. The screenshot is automatically saved to your desktop. How to take a screenshot of your entire screen Press Shift-Command (⌘)-3. Find the screenshot as a .png file on your desktop. How to take a screenshot of a selected portion of your screen This works with windows in the Finder and most apps. Press Shift-Command-4. The pointer changes to a crosshair. Move the crosshair to where...