Huawei Mate 10 Pro User Manual page 29

Gestures and Operation
After taking the screenshot, touch or to edit or share the screenshot. The screenshot
will be saved in Gallery by default.
Take a Partial Screenshot
Knock the screen with a knuckle and draw an outline around the part of the screen that you want
to capture, making sure that your knuckle does not leave the screen. The screen will display the
movement trajectory of your knuckle and take a screenshot of the selected area. You can touch
the icons at the top of the screen to select preset shapes for your screenshot, then touch to
save the picture.
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