User interface provision method and electronic device for supporting same

A portable electronic device comprising:

• a housing including a first surface and a second surface facing a direction opposite to the first surface;
• a display including a touchscreen panel exposed through the first surface of the housing and having a substantially rectangular shape, wherein the display has a first side and a third side extending with a first length in a first direction, and a second side and a fourth side substantially perpendicular to the first direction and extending with a second length which is less than the first length, and wherein a ratio of the first length to the second length is x:
• 9, in which the x is equal to or greater than 16;
• a wireless communication circuit included in the housing;
• a processor included in the housing and electrically connected with the display and the wireless communication circuit;
• and
• a memory included in the housing and electrically connected with the processor,
• wherein the memory stores instructions that, when executed, cause the processor to:
• display at least one first icon having a first size on a first region in contact with the second side or the fourth side of the display or adjacent to the second side or the fourth side while longitudinally extending;
• display at least one second icon having a second size on the first region, based at least partially on an event occurring inside the electronic device or an event received through the wireless communication circuit;
• responsive to receiving a first user gesture input selecting the at least one second icon through the first region of the display, perform a first function associated with the event;
• and
• responsive to receiving a second user gesture input selecting the at least one second icon, perform a second function associated with the event.