Electronic device supporting multi-window, and control method thereof

A method of controlling an electronic device, the method comprising:

• displaying, through a touch screen of the electronic device, a first window as a lower layer and a second window as an upper layer at least partially overlapping the first window;
• receiving an input through a first area, not overlapping the second window, of the first window;
• and
• increasing, based on detecting that the input continuously moves from the first area to a second area where the first window is overlapped with the second window, transparency of the second window.

A non-transitory computer-readable medium storing computer-executable instructions, wherein the computer-executable instructions, when executed by at least one processor of an electronic device individually or collectively, cause the electronic device to:

• display, through the touch screen, a first window as a lower layer and a second window as an upper layer at least partially overlapping the first window;
• receive an input through a first area, not overlapping the second window, of the first window;
• and
• increase, based on detecting that the input continuously moves from the first area to a second area where the first window is overlapped with the second window, a transparency of the second window.