For iOS devices:

iPhone 13 and other models with Face ID:
1. Press the side button and the Volume Up button at the same time.
2. Quickly release both buttons.
3. Open Photos, then go to Albums > Media Types > Screenshots.

iPhone models with Touch ID and side buttons:
1. Press the side button and the Home button at the same time.
2. Quickly release both buttons.
3. Open Photos, then go to Albums > Media Types > Screenshots.

iPhone models with Touch ID and top buttons:
1. Press the top button and the Home button at the same time.
2. Quickly release both buttons.
3. Open Photos, then go to Albums > Media Types > Screenshots.

For Android devices:
1. Press the Power and Volume Down buttons at the same time.
2. Hold them for a couple of seconds, then let go.
3. Open your Photo Gallery where screenshots are saved automatically.

For macOS devices:
1. Press and hold these three keys together: Shift, Command, and 3.
2. You will see a thumbnail in the corner of your screen: Click it to edit the screenshot, or wait for the screenshot to save it to your desktop.

For Windows devices:
1. Press the Windows key + PrtScn.
2. You can find the screenshot in Pictures > Screenshots.
Some keyboards may use Function + Home (if the PrtScn button is missing).