Control Your Phone with Gestures
If this is your first phone from OnePlus you'll want to know about Gestures. They're one of the best when it comes to taking full advantage of anything that could improve out smartphone experience.
Go to Settings > Gestures > and start having fun. From here you can draw letters on the screen (even when it's turned off) to instantly launch the camera, open apps, and complete tasks. It's basically one more way to do things on the phone and do them quickly. Control your music, launch the camera and more.