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