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