In the rich text editor:
@nastya_rat
In a comment:
[nastya_rat](https://chowlings.com/user/nastya_rat)
For Names and Avatars:
In the rich text editor:
%nastya_rat
In a comment:
[](https://chowlings.com/user/nastya_rat) [nastya_rat](https://chowlings.com/user/nastya_rat)
