In the rich text editor:
@Migeymon
In a comment:
[Migeymon](https://chowlings.com/user/Migeymon)
For Names and Avatars:
In the rich text editor:
%Migeymon
In a comment:
[![Migeymon's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Migeymon) [Migeymon](https://chowlings.com/user/Migeymon)