In the rich text editor:
@AlexDirEn
In a comment:
[AlexDirEn](https://chowlings.com/user/AlexDirEn)
For Names and Avatars:
In the rich text editor:
%AlexDirEn
In a comment:
[![AlexDirEn's Avatar](https://chowlings.com/images/avatars/312.png?v=1694026077)](https://chowlings.com/user/AlexDirEn) [AlexDirEn](https://chowlings.com/user/AlexDirEn)