A method, comprising: at an electronic device having a display and a communication interface: displaying, on the display, a configuration interface, wherein the configuration interface comprises representations (669, 672-a) of a plurality of applications that are to be included in a generated user interface for display on a peripheral display unit, wherein the configuration interface includes: a first portion that includes a first representation (672-a) of a first application that is included in a first set of the representations of the plurality of applications and an affordance for removing the first representation (672-a) of the first application from the first set of the representations of the plurality of applications; and a second portion that includes a second set of one or more representations (672-b) of applications; detecting a request to configure the user interface of the peripheral display unit that includes detecting an input that corresponds to selection of the affordance; and in response to detecting the request to configure the user interface: displaying, on the display of the electronic device, an updated configuration interface that includes ceasing to display the first representation (672-a) of the first application in the first set of the representations of the plurality of applications and displaying the first representation (672-a) of the first application in the second set of one or more representations of applications; and generating, at the electronic device, a peripheral user interface for the peripheral display unit in accordance with the detected request, wherein the first representation (672-a) of the first application is not included in the generated peripheral user interface; and after detecting the request to configure the user interface of the peripheral display unit, transmitting instructions to the peripheral display unit to display the generated peripheral user interface. displaying, on the display, a configuration interface, wherein the configuration interface comprises representations (669, 672-a) of a plurality of applications that are to be included in a generated user interface for display on a peripheral display unit, wherein the configuration interface includes: a first portion that includes a first representation (672-a) of a first application that is included in a first set of the representations of the plurality of applications and an affordance for removing the first representation (672-a) of the first application from the first set of the representations of the plurality of applications; and a second portion that includes a second set of one or more representations (672-b) of applications; a first portion that includes a first representation (672-a) of a first application that is included in a first set of the representations of the plurality of applications and an affordance for removing the first representation (672-a) of the first application from the first set of the representations of the plurality of applications; and a second portion that includes a second set of one or more representations (672-b) of applications; detecting a request to configure the user interface of the peripheral display unit that includes detecting an input that corresponds to selection of the affordance; and in response to detecting the request to configure the user interface: displaying, on the display of the electronic device, an updated configuration interface that includes ceasing to display the first representation (672-a) of the first application in the first set of the representations of the plurality of applications and displaying the first representation (672-a) of the first application in the second set of one or more representations of applications; and generating, at the electronic device, a peripheral user interface for the peripheral display unit in accordance with the detected request, wherein the first representation (672-a) of the first application is not included in the generated peripheral user interface; and displaying, on the display of the electronic device, an updated configuration interface that includes ceasing to display the first representation (672-a) of the first application in the first set of the representations of the plurality of applications and displaying the first representation (672-a) of the first application in the second set of one or more representations of applications; and generating, at the electronic device, a peripheral user interface for the peripheral display unit in accordance with the detected request, wherein the first representation (672-a) of the first application is not included in the generated peripheral user interface; and after detecting the request to configure the user interface of the peripheral display unit, transmitting instructions to the peripheral display unit to display the generated peripheral user interface.