In the rich text editor:
@Sloompop30
In a comment:
[Sloompop30](https://chowlings.com/user/Sloompop30)
For Names and Avatars:
In the rich text editor:
%Sloompop30
In a comment:
[![Sloompop30's Avatar](https://chowlings.com/images/avatars/1149.png?v=1644063255)](https://chowlings.com/user/Sloompop30) [Sloompop30](https://chowlings.com/user/Sloompop30)