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