Press the Side button and the Volume Up button at the same time
Release both buttons quickly
Tap the screenshot thumbnail to edit it, or wait for it to save automatically
On iPhone with a Home button, press the Home button and the Side button at the same time
On iPhone with a Home button and top button, press the Home button and the Top button at the same time
On Mac, press Command + Shift + 3 to capture the full screen
On Mac, press Command + Shift + 4 to capture a selected area
On Mac, press Command + Shift + 5 to open screenshot options
On Apple Watch, press the Side button and the Digital Crown at the same time
On iPad, press the Top button and the Volume Up button at the same time
On iPad with a Home button, press the Home button and the Top button at the same time