In the rich text editor:
@ghostiegale
In a comment:
[ghostiegale](https://chowlings.com/user/ghostiegale)
For Names and Avatars:
In the rich text editor:
%ghostiegale
In a comment:
[![ghostiegale's Avatar](https://chowlings.com/images/avatars/1044.png?v=1644063247)](https://chowlings.com/user/ghostiegale) [ghostiegale](https://chowlings.com/user/ghostiegale)