Up Down Arrow

The Up Down Arrow at U+2195 shows a vertical two-way direction, linking upward and downward movement in a single symbol. It is a printable character in the Unicode Arrows block, used when both vertical directions are relevant rather than one specific direction. Its most common use is in interfaces, documents, and diagrams to mean “up and down,” such as vertical resizing, scrolling, sorting through a list, or moving an item along a vertical axis. In plain text, it can stand in for a compact label like “top/bottom,” “higher/lower,” or “move vertically,” especially where an icon would be too large. In technical and mathematical contexts, ↕ may mark a bidirectional vertical relationship, a variable that can increase or decrease, or a connection between two vertically arranged elements in a flowchart or schematic. It is also sometimes used in accessibility, layout, and measurement discussions to point to vertical spacing, height adjustment, or alignment between upper and lower positions. It should not be confused with separate up and down arrows used for one-way actions, or with heavier icon-style arrows chosen in graphical user interfaces when visual weight matters.