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