In the rich text editor:
@Jerot
In a comment:
[Jerot](https://chowlings.com/user/Jerot)
For Names and Avatars:
In the rich text editor:
%Jerot
In a comment:
[![Jerot's Avatar](https://chowlings.com/images/avatars/2857.jpg?v=1699938262)](https://chowlings.com/user/Jerot) [Jerot](https://chowlings.com/user/Jerot)