How to … @Mention Members on TST
TST allows you to easily "mention" people on the site with the use of the "@" symbol. If the mentioned member has the setting enabled, they'll receive a notification (via the site, an email, or both).
Without a space preceding or at the start of a new line, type the "@" character.
Type enough of the member's name to narrow the popup list down sufficiently.
Use the arrow keys or your mouse to select the member you want to mention, then click or press return to "@mention" them.