Tech Tip – Capturing part of my Mac screen is not something I do every day, but it is something I do every week. Apple has made this easy with three different keyboard shortcuts to capture the screen, a window or a region.
Your entire screen – To capture the screen, hit the SFT + CMD + 3. This will capture your entire desktop (even if you have multiple monitors) and save it as a .png file on your desktop.
A region of your screen – To capture a region of the screen, hit the SFT + CMD + 4. That changes the mouse pointer a cross hair. Move that crosshair to the start point, then hold the mouse button down to drag the crosshair to select the area of the screen you want to capture. When you release the mouse button the designated area will be captured to a .png file that is saved to your desktop.
A Window – To capture an entire window, hit the SFT + CMD + 4 like you were going to capture an area. Before doing anything tap the space bar. The icon will change from a crosshair to a camera. Use that to click on any window to select it. Then click the mouse button to capture a .png file of it to your desktop.