# Human-Computer Interfaces : Inbox ## Compose Key \[ [Wikipedia](https://en.wikipedia.org/wiki/Compose_key) | [Ubuntu](https://help.ubuntu.com/community/ComposeKey) ] >"A **compose key** (sometimes called **multi key**) is a key on a keyboard that indicates that the following (usually 2 or more) keystrokes trigger the insertion of a special character or symbol." #### Ubuntu ###### To Configure Settings > Keyboard > Special Character Entry > Compose Key *(I choose Caps Lock)* ###### List of Sequences ``` $ ls -l /usr/share/X11/locale/en_US.UTF-8/Compose -rw-r--r-- 1 root root 454647 Apr 8 2024 Compose $ less /usr/share/X11/locale/en_US.UTF-8/Compose ... # Dashes <Multi_key> <minus> <minus> <period> : "–" U2013 # EN DASH <Multi_key> <minus> <minus> <minus> : "—" U2014 # EM DASH ... ``` For example, I can now press "Caps Lock, minus, minus, minus" to produce an em-dash (—).