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