Portable terminal and displaying method during video telephony using the same

A portable terminal having a user interface capable of adjusting an image of the other party during a video call and a display method using the same are provided. A user of a portable terminal begins a video call in which the voice of the user and a moving picture photographed through a camera are transmitted in real time(S310). The user determines whether to perform a crop mode, in case he/she wants to enlarge an image of the other party or a portion of the image while the video call is being performed(S320). When a cursor or an area selection window for crop domain selection is displayed on a display unit, the user selects a portion to be cropped on the image of the other party(S340). The cropped portion is enlarged and displayed on the display unit(S350).