How do I take screenshots on an iOS on an iPhone or iPad?

Press and hold the “Home” & “Power” buttons at the same time. The image will be saved in the Camera Roll. For newer devices that don’t have a “Home” button, press “Volume Up” & “Power” buttons at the same time.

How do I take screenshots on an Android phone or tablet?

For most Android devices, press and hold the 'Volume Down' & 'Power' buttons at the same time.

How do I take screenshots on a Windows 10 computer or laptop?

Press and hold the 'Windows Key' & 'Print Screen' buttons (Print Screen/SysRq). On Windows 8, the image will be saved in the Screenshots Folder in your Pictures Library. On Windows 10, the image will be saved to the Clipboard.

How do I take screenshots on a Mac OS X on a computer or laptop?

Press and hold the 'Command' Key & 'Shift' & '3' buttons at the same time. A full screen image will be saved on your Desktop.