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