Button Use

Power Button: Power on and off, sleep screen or turn on screen.
Shutter Button: Start recording, stop recording, or take a photo.
Lens Button: Switch the shooting mode, e.g. Single-Lens Mode or 360 Mode.
Quick Button: Quick access to shooting presets. You can select or edit the presets.

The Power Button and Quick Button are located on the right side of the camera.
The Shutter Button and Lens Button are located below the touchscreen on the front of the camera.