Display device and operating method thereof with adjustments display

A display device comprising:

• a display;
• a camera configured to capture an image, the camera being disposed in a same direction with the display;
• a sensor configured to detect a bending motion or a bent state of the display device;
• and
• a control unit configured to control the display to display a preview image for capturing an image using the camera in a portion of a first area of the display, based on the sensor detecting the bending motion and based on a camera application for capturing an image being executed,
• wherein the display is divided into the first area and a second area based on a position at which the display is bent,
• wherein the control unit is further configured to determine a smallest recognizable size based on a display size of the display,
• wherein a preview location of the portion of the first area in which the preview image is to be displayed is determined by the control unit based on a location at which the camera is disposed on the display device, and
• wherein a preview size of the portion of the first area is set to the determined smallest recognizable size.