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