Follow these steps to take a timed screenshot using Mojave or later: 1. Long-press the “Command + Shift + 5” buttons. 2. Select “Options.” 3. Beneath “Timer,” select 5 or 10 seconds. 4. Select the type of screengrab you wish to take: the whole screen, a selected window, or a selected portion. 5. A timer will begin. Once it gets to zero, your screenshot will be captured.