Display device for controlling displaying of a window and method of controlling the same

An electronic device comprising:

• a touch screen;
• and
• at least one processor configured to:
• display a first execution screen of a first application having a first type in a first window and a second execution screen of a second application having a second type in a second window, wherein the first window and the second window do not overlap each other and wherein a boundary line splits the first window and the second window,
• detect a touch interaction on at least part of the boundary line,
• according to a movement of the touch interaction on the boundary line, gradually decrease a size of the first window and move the boundary line, and display the first execution screen of the first application in a reduced first window, and
• based at least on the reduced first window having a size equal to a threshold according to the decrease of the size of the first window, display a third execution screen of the first application having a third type in the first window in replacement with the first execution screen of the first application.

A non-transitory computer-readable medium storing instructions, that when executed by a processor, causes the processor to:

• display a first execution screen of a first application having a first type in a first window and a second execution screen of a second application having a second type in a second window, wherein the first window and the second window do not overlap each other and wherein a boundary line splits the first window and the second window;
• detect a touch interaction on at least part of the boundary line;
• according to a movement of the touch interaction on the boundary line, gradually decrease a size of the first window and move the boundary line, and display the first execution screen of the first application in a reduced first window;
• and
• based at least on the reduced first window having a size equal to a threshold according to the decrease of the size of the first window, display a third execution screen of the first application having a third type in the first window in replacement with the first execution screen of the first application.