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