In the rich text editor:
@au_tumn
In a comment:
[au_tumn](https://chowlings.com/user/au_tumn)
For Names and Avatars:
In the rich text editor:
%au_tumn
In a comment:
[](https://chowlings.com/user/au_tumn) [au_tumn](https://chowlings.com/user/au_tumn)
