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