Up, Arrow
This is a button, which is displayed as a triangle with a sharp angle upward. It should be noted that the background frame will be presented differently on different platforms. For example, Google platform depicts orange background frame, Microsoft platform depicts blue background frame with black edge, and Facebook platform background frame is gray. Except for OpenMoji platform, which replaces triangles with a curve with an upward apex angle, other platforms depict triangles with different shapes, some equilateral triangles and some isosceles triangles. As for the color of triangle, most platforms use black, white and gray, and some platforms design red or purplish red triangles.
The emoji is commonly used in music players and video players, which means to increase the volume when playing music; Sometimes it is also used at the elevator entrance, indicating that the elevator goes up.
