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