In the rich text editor:
@satellor
In a comment:
[satellor](https://chowlings.com/user/satellor)
For Names and Avatars:
In the rich text editor:
%satellor
In a comment:
[![satellor's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/satellor) [satellor](https://chowlings.com/user/satellor)