A method and electronic devices to provide a common user interface mode on a first electronic device and a second electronic device are described. The first electronic device and the second electronic device each comprise a camera. In one aspect, the method comprises: capturing a first image on the first electronic device; receiving a second image which was captured on the second electronic device at approximately the same time that the first image was captured; determining a relative orientation of the first electronic device and the second electronic device based on the first image and the second image; and entering a common user interface mode in which a display associated with the first electronic device and a display associated with the second electronic device operate cooperatively and in which the orientation of a common user interface displayed on the displays is determined in accordance with the determined relative orientation.