Devices, methods, and graphical user interfaces for interacting with three-dimensional environments

A computer system displays an alert at a first position relative to the three-dimensional environment, the alert at least partially overlapping a first object in a first view. The first position has a respective spatial relationship to the user. The computer system detects movement of the user from a first viewpoint to a second viewpoint. At the second viewpoint, the computer system, in accordance with a determination that the alert is a first type of alert, displays the alert at a second position in the three-dimensional environment, the second position having the respective spatial relationship to the user and in accordance with a determination that the alert is a second type of alert, displays the three-dimensional environment from the second viewpoint without displaying the alert with the respective spatial relationship to the user.