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