In an exemplary process for accessing a function of an external device through a computer-generated reality interface, one or more external devices are detected. Image data of a physical environment captured by an image sensor is obtained. The process determines whether the image data includes a representation of a first external device of the one or more detected external devices. In accordance with determining that the image data includes a representation of the first external device, the process causes a display to concurrently display a representation of the physical environment according to the image data, and an affordance corresponding to a function of the first external device, wherein detecting user activation of the displayed affordance causes the first external device to perform an action corresponding to the function.