Mevo has the ability to detect up to four faces, making it easy for you to switch between subjects to focus on.
To turn on face detections, tap the More Options menu icon.
Tap the Camera Assistant icon to the far left.
Turn on Find Faces by tapping it. It will go from gray to white.
Now a blue box should appear around any human faces that appear in your Mevo's field of view. These trackers will follow the face's motions as long as they stay within view.
You can also set up to eight manual shots if there are more than four people in the view, or to easily cut to non-human objects. See here for instructions.