1. A mobile terminal comprising: a touch screen configured to display first image in an image view mode, the image view mode corresponding to displaying an image stored at the mobile terminal; and a controller configured to: extract a first region and a second region from the first image based on a touch gesture applied to the first image when a thumbnail creation mode is executed; create a first region thumbnail and a second region thumbnail for the corresponding first and second regions and map the first and second region thumbnails to the first image; and cause the touch screen to display a plurality of thumbnails including the created first and second region thumbnails of the first image when an image preview mode is executed, wherein the created first and second region thumbnails are distinctly displayed from the remaining thumbnails of the plurality of thumbnails and display of the created first and second region thumbnails is alternated at a same thumbnail display position, and wherein the first image is originally maintained after creating the first and second region thumbnails and the first image includes an unexposed region that is not included in the created first region thumbnail or the created second region thumbnail.