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