In the rich text editor:
@SubStars
In a comment:
[SubStars](https://chowlings.com/user/SubStars)
For Names and Avatars:
In the rich text editor:
%SubStars
In a comment:
[![SubStars's Avatar](https://chowlings.com/images/avatars/3218.jpeg?v=1713790687)](https://chowlings.com/user/SubStars) [SubStars](https://chowlings.com/user/SubStars)