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