Mobile terminal and control method therefor

A mobile terminal comprising:

• a body;
• a transceiver configured to externally transmit or receive a signal;
• a display coupled to the body, wherein a display region viewable from a front of the body is variable according to switching between an enlarged display mode and a reduced display mode, wherein the display includes a flexible display surrounding the front, a side, and a rear of the body;
• and
• a processor,
• wherein the processor is configured to:
• move a display portion positioned at the side of the body to the front of the body and move a display portion positioned at the rear of the body to the front of the body via the side of the body when the display is switched to the enlarged display mode;
• output a message pop-up window and a button both corresponding to a notification corresponding to a second application upon receiving the notification while a first application is being output at the display;
• receive input of a first signal corresponding to a touch selecting of the button;
• output a preview pop-up window for the second application while the input of the first signal is maintained;
• and
• if the first application is being output in the enlarged display mode, output the second application at a first region of the display in the enlarged display mode and output the first application at a second region of the display in the enlarged display mode when a dragged distance of the first signal exceeds a first threshold value,
• wherein the first application is being output in the reduced display mode, and
• wherein the processor is further configured to:
• switch the display to the enlarged display mode upon outputting the second application at the preview pop-up window based on the first signal or outputting the second application at the first region based on the first signal;
• and
• switch the display to the reduced display mode and end the output of the second application, when the input of the first signal is dragged in a fourth direction in a state in which the input of the first signal is not released, after the display is switched to the enlarged display mode based on the first signal.