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