Method 1. Press the on / off button and volume down button at the same time and the and hold until the phone vibrates.
Method 2. The print will be immediately saved in the phone memory. You can also choose the options that appear at the bottom of the screen, such as "Bixby Vision", to recognize objects; "Draw" to make notes in print; "Cut" to crop the image and "Share" to send the catch to your friends.