If you have created your own tags using style sheets or just need to define an unusual tag, then you will need to add a tag to the User Defined Tag list.
First start the HTML Tag manager:
On the View menu select the Resources submenu.
In the Resources submenu click on HTML Tags.
Now open the Syntax File Manager:
On the top left of the HTML Tags Manager click Add/Edit Tags
You can edit HotDogs current syntax tags or create your own.
Click the Load Syntax File Button.
To Create a new Syntax File:
Click the New Syntax File Button.
For a step by step example of add an HTML tag to the syntax manager, see the tutorial below.