Embodiments described herein may provide a configuration of input interfaces used to perform multi-touch operations. An example device may involve: (a) a housing arranged on a head-mountable device, (b) a first input interface arranged on either a superior or an inferior surface of the housing, (c) a second input interface arranged on a surface of the housing that is opposite to the first input interface, and (d) a control system configured to: (1) receive first input data from the first input interface, where the first input data corresponds to a first input action, and in response, cause a camera to perform a first operation in accordance with the first input action, and (2) receive second input data from the second input interface, where the second input data corresponds to a second input action(s) on the second input interface, and in response, cause the camera to perform a second operation.