Displaying and updating content items in a primary viewing screen and one or more secondary viewing screens in a computer-generated environment is disclosed. The primary and secondary viewing screens can present different content items, or in some examples the secondary viewing screens can present content items that correspond to the content items in the primary viewing screen. A viewer can provide input to change the size and arrangement of the viewing screens, change the content items being displayed in the viewing screens, or change the designations (primary or secondary) of the viewing screens. The viewer can also establish criteria that can trigger the automatic updating of content items being displayed in the viewing screens. In some examples, a viewer can join a multi-user communication session to jointly view the primary viewing screen and the one or more secondary screens while maintaining control over some of the viewing screens.