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