A method of controlling a mobile terminal, and which includes displaying, via a display on the mobile terminal, a captured or a preview image in a first display portion, displaying, via the display, the same captured or a preview image in a second display portion, zooming, via a controller on the mobile terminal, the captured or preview image displayed in the first display portion, and displaying, via the display, a zoom guide on the image displayed in the second display portion that identifies a zoomed portion of the image displayed in the first display portion.