↕
↕ Up Down Arrow
The up-down arrow (↕) points both ways vertically — a two-way vertical relationship in a diagram, and the resize or sort handle in an interface.
Also known as: up down arrows, up and down arrow, vertical double arrow, resize arrow.
Codes
| Symbol | ↕ | |
| Double (⇕) | ⇕ · U+21D5 | |
| Unicode | U+2195 | |
| HTML entity (named) | ↕ · ↕ | |
| HTML entity (decimal) | ↕ | |
| HTML entity (hex) | ↕ | |
| CSS | \2195 | |
| LaTeX | \updownarrow | |
| Windows Alt code | Alt + 18 |
How to type ↕ (Up Down Arrow)
WindowsAlt + 18
Hold Alt and type 18 on the numeric keypad, then release Alt (or type 2195 then Alt + X in Word). Alt + 8597 also works where decimal-Unicode input is supported.
Mac
No default keystroke. Open Character Viewer (Control + Cmd + Space) and search “up down arrow”, or copy ↕ above.
Microsoft Word2195, Alt + X
Type 2195, then press Alt + X to convert it to ↕.
Google Docs
Insert → Special characters, then search “up down arrow”.
LaTeX\updownarrow
Use \updownarrow in math mode; \Updownarrow gives the double form ⇕. Both also work as stretchy delimiters with \left and \right.
Usage
- ↕ marks a two-way vertical relationship: a bidirectional vertical link in a diagram, a value that can move up or down, or a range between a floor and a ceiling.
- In interfaces ↕ is the vertical resize handle and the “sortable column” indicator — the state before you have picked ascending or descending.
- The Alt code comes from the original IBM PC character set, which put arrows in the low range: ↕ is Alt + 18, ↨ is 23, ↑ is 24, ↓ is 25, → is 26, ← is 27 and ↔ is 29. These are the shortest arrow Alt codes there are.
- Which one to use: ↕ (U+2195) is the plain arrow. ⇕ (U+21D5) is the double-stroke version used in logic and for stretchy delimiters. ⇅ (U+21C5) is a different symbol again — two separate arrows side by side, used for up/down traffic or transfer.