A mobile terminal includes a display, an input unit and a controller. The display is configured to display three-dimensional (3D) content having first and second images for viewing by a left eye and a right eye, respectively. A same object depicted in each of the first and second images includes a common point. A position of the common point in relation to the first and second images is separated by a distance based on a 3D depth of the object. The controller is configured to cause displaying of the 3D content; select the object in response to detection of a first input; and change a position of the object in at least the first or second image in response to a detection of a second input related to changing the 3D depth of the object such that the distance between the common point in the first and second images changes.