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