In the rich text editor:
@Stardream20
In a comment:
[Stardream20](https://chowlings.com/user/Stardream20)
For Names and Avatars:
In the rich text editor:
%Stardream20
In a comment:
[](https://chowlings.com/user/Stardream20) [Stardream20](https://chowlings.com/user/Stardream20)