An electronic device, comprising: a touchscreen; and a processor configured to: receive a first user input (203, 403, 503) via the touchscreen while a first task execution screen of a first task is displayed on the touchscreen in a full screen view (201, 301, 401, 501), based on receiving the first user input (203, 403, 503), control the touchscreen to display (205, 405, 505) a plurality of partially overlaid visual elements on the touchscreen, wherein the visual elements respectively correspond to a plurality of tasks including the first task, receive a second user input for removing a visual element corresponding to a second task from the plurality of visual elements, while the plurality of visual elements are displayed on the touchscreen, based on receiving the second user input, remove the visual element corresponding to the second task from the plurality of visual elements, and increase an interval between two consecutive visual elements of the visual elements remaining in the plurality of visual elements after removing the visual element corresponding to the second task, receive a third user input (211, 407, 511) for selecting a visual element corresponding to a third task from the plurality of visual elements, and based on receiving the third user input, control the touchscreen to display (213, 411, 513), in a full screen view, a second task execution screen of the third task corresponding to the selected visual element. a touchscreen; and a processor configured to: receive a first user input (203, 403, 503) via the touchscreen while a first task execution screen of a first task is displayed on the touchscreen in a full screen view (201, 301, 401, 501), based on receiving the first user input (203, 403, 503), control the touchscreen to display (205, 405, 505) a plurality of partially overlaid visual elements on the touchscreen, wherein the visual elements respectively correspond to a plurality of tasks including the first task, receive a second user input for removing a visual element corresponding to a second task from the plurality of visual elements, while the plurality of visual elements are displayed on the touchscreen, based on receiving the second user input, remove the visual element corresponding to the second task from the plurality of visual elements, and increase an interval between two consecutive visual elements of the visual elements remaining in the plurality of visual elements after removing the visual element corresponding to the second task, receive a third user input (211, 407, 511) for selecting a visual element corresponding to a third task from the plurality of visual elements, and based on receiving the third user input, control the touchscreen to display (213, 411, 513), in a full screen view, a second task execution screen of the third task corresponding to the selected visual element. receive a first user input (203, 403, 503) via the touchscreen while a first task execution screen of a first task is displayed on the touchscreen in a full screen view (201, 301, 401, 501), based on receiving the first user input (203, 403, 503), control the touchscreen to display (205, 405, 505) a plurality of partially overlaid visual elements on the touchscreen, wherein the visual elements respectively correspond to a plurality of tasks including the first task, receive a second user input for removing a visual element corresponding to a second task from the plurality of visual elements, while the plurality of visual elements are displayed on the touchscreen, based on receiving the second user input, remove the visual element corresponding to the second task from the plurality of visual elements, and increase an interval between two consecutive visual elements of the visual elements remaining in the plurality of visual elements after removing the visual element corresponding to the second task, receive a third user input (211, 407, 511) for selecting a visual element corresponding to a third task from the plurality of visual elements, and based on receiving the third user input, control the touchscreen to display (213, 411, 513), in a full screen view, a second task execution screen of the third task corresponding to the selected visual element.