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