Upwards Arrow with Double Stroke

Upwards Arrow with Double Stroke at U+21DE denotes an upward arrow marked by two short horizontal strokes through its shaft, most often recognized as the Page Up symbol on keyboards and in interface documentation. It is part of the Arrows block, a Unicode range for directional signs, keyboard-style arrows, and mathematical arrow symbols. Its main real-world use is in computing: manuals, keyboard shortcut lists, and keycap legends use it to label the Page Up key or a page-up action, especially where a compact symbol is preferred over the words “Page Up.” You may see it in shortcut tables such as ⇞ to scroll upward by one screen, or paired with the corresponding downwards double-stroke arrow for Page Down. It can also appear in software UI text, terminal-oriented documentation, and technical diagrams that need to show navigation keys without relying on platform-specific keycap artwork. Outside keyboard notation it is uncommon; ordinary upward direction is more usually written with a plain up arrow, so this character’s double stroke is the clue that the intended meaning is paging upward rather than simply “up.”