Microsoft Lumia 640 User Manual page 22

Zoom in or out
Place 2 fingers on an item, such as a map, photo, or web page, and slide your fingers apart or
together.
Lock the screen orientation
The screen rotates automatically when you turn the phone 90 degrees. To lock the screen in
its current orientation, on the start screen, swipe down from the top of the screen, and tap
ALL SETTINGS > screen rotation. Switch Rotation lock to On .
Screen rotation may not work in all apps or views.
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