U+2195 "↕" Up down Arrow Unicode Character

U+2195 "↕" Up down Arrow is a typographic symbol representing a vertical line with arrowheads pointing both upward and downward, signifying duality, bidirectional movement, or the ability to navigate or shift between opposite directions or states. It is commonly used in user interface design for buttons that expand or collapse content, in mathematics to indicate a relationship or operation involving two extremes, and in diagrams to denote vertical alignment or range. As part of the Arrows block in Unicode, it provides a clear, concise visual cue for vertical bidirectional interaction.