Abstract: A portable apparatus comprising a display screen, a processor, and an input device operable by a user of the portable apparatus. The processor is configured to control the display screen to display a graphical user interface comprising at least one object in a three dimensional (3D) space. The input device is configured to detect a user input and to provide an input signal to the processor. The processor is further configured to receive the input signal, to determine an input location within the display screen, to determine a direction of a rotation axis extending through a pivot point within the 3D space transverse to a line extending from the input location to the pivot point, and to cause the at least one object to rotate within the 3D space about the rotation axis. A graphical user interface suitable for being displayed by the portable apparatus and a method of operating a portable apparatus are also disclosed.