A device includes a device body comprising a user input interface for receiving user inputs, a member slidably engaged with the device body and slidable from a first position to a second position, and at least one processor configured, under the control of machine-readable code to detect incidences of user inputs via the user input interface, to detect the sliding of the member from the first position to the second position, and to be responsive to detecting a composite user input comprising a sliding of the member from the first position to the second position while a user input is incident via the user input interface to cause a first operation to be performed.