Keep yourself framed

Turn on Keep my face framed in the Camera tab. The camera picture moves gently to keep your face centred. Mirror flips the picture.

Follow your face

Open the Camera tab on the right.
Under How you look, turn on Keep my face framed.

As you move, the camera picture shifts smoothly to keep your face in the middle.

Get closer

With the Full screen layout, drag Zoom in to fill more of the frame with your face. 1.20× is a good start. For the other layouts, change Size.

Mirror

Mirror flips the camera left to right, like a mirror. Turn it off if text behind you, such as a sign or a book, reads backwards.

Crop the camera

To cut something out of the camera picture, such as a busy edge of the room:

Open More settings at the bottom of the tab, then Shape and place, and find Crop the camera.
Drag the edges of the box to the part you want to keep.

Click Reset crop to show the whole picture again.