Follow these steps to capture a portion of your screen: 1. Long-press the following keys: “Shift + Command + 4.” 2. Now drag the crosshair to highlight the area you wish to capture. 3. Long-press the “Space” bar while dragging the crosshair to move the selection. Press the “Esc” key to cancel the screenshot. 4. Release your mouse or trackpad button to take the screenshot. 5. If you need to edit the screenshot, click on the thumbnail that appears at the corner of your screen. Or you can edit it by opening it up once it’s saved to your desktop.