User Mentions
When you are typing in the post editor, type the @ symbol and (at least) 3 (or more) characters, which are matched against users' display names, and you are presented with a list of one or more users:
After you select the user, their DNN avatar and a link to their user profile are inserted into the post:
In the control panel, there is now a feature setting for each forum, forum group, or default for the module that lets you select a new "editor type":
(remember that you can have forums inherit from groups, and groups inherit from module defaults, so you might only need to set this for the module defaults and it will flow downward).
This editor option is now the default for a new installation, and if you are upgrading, and it was previously set to Default DNN Editor, it will change to the new DNN CKEditor4 plus Forums plugins option.
When you are mentioned in a post, you will receive a DNN notification:
There is also a user option where you can disable/enable these notifications:
