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