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