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