Screenshot on Windows: Press the "Windows key + Print Screen" (or "PrtScn") key on your keyboard. The screenshot will be saved to the "Screenshots" folder in your "Pictures" folder.
Mac: Press "Command + Shift + 3" to take a screenshot of the entire screen, or "Command + Shift + 4" to select a specific area. The screenshot will be saved to your desktop.
Android: Press the "Power + Volume down" buttons simultaneously to take a screenshot. The screenshot will be saved to your device's "Screenshots" folder.
iPhone or iPad: Press the "Home + Power" buttons simultaneously to take a screenshot. The screenshot will be saved to your device's "Photos" app.