DEVICES, METHODS, AND GRAPHICAL USER INTERFACES FOR INTERACTING WITH THREE-DIMENSIONAL ENVIRONMENTS

A computer system displays a view of a communication session between a first and second user of a first and second display generation component, respectively. The view of the communication session includes a view of a three-dimensional environment, virtual content shared between the first and second user, and a representation of the second user based on a virtual spatial relationship between the first and second user in the three-dimensional environment. While displaying the view of the communication session, the computer system displays a user interface, including a control object, and detects a user input activating the control object. In response, the computer system modifies the appearance of a three-dimensional region of the three-dimensional environment for the first user of the first display generation component, and initiates a process for modifying the appearance of the three-dimensional region of the three-dimensional environment displayed at the second display generation component.