1. A handheld mobile terminal comprising: a camera configured to process an image; a touch screen configured to display an executed screen of a note application comprising at least one note; and a controller configured to: receive a single touch input via the touch screen displaying the executed screen comprising the at least one note, and in response to the single touch input designate a first area on the executed screen comprising the at least one note based on the single touch input and in response to the single touch input display a preview image processed via the camera on the first area of the executed screen comprising the at least one note, wherein the first area is designated based on a trace of the single touch input and a contour is displayed in response to the trace of the single touch input, the first area being designated within the contour, and wherein the controller is further configured to cause the camera to capture an image in response to a second touch input, and the captured image is displayed in the first area.