There are a few ways to screenshot on the Samsung Galaxy S20 Ultra. The first way is to use the screenshot tool that comes with the phone. To do this, open the app and select the screenshot option. Then, take a picture of what you want to screenshot and save it to your phone. The second way is to use the camera shortcut that comes with your phone. To do this, open the camera app and select the shortcut for screenshots. Then, take a picture of what you want to screenshot and save it to your phone.