You can take a screenshot in a few ways. Use the one that's most convenient for you.
When you're on the screen that you want to capture, choose one:
Touch & hold three fingers on the screen. (If this doesn't work, turn Use Three-finger screenshot on.)


To scroll and capture more content, tap 
To stop scrolling before the end of the page, tap STOP or 
Do any of the following:




Open the Photos app 