With Impact you can create support articles and assign them to categories to structure your support center.
Open Support
In Global Navigation, click the Support link.
Open Arrange Articles
Then click the Arrange Articles tab.
Open Support Center
Click the support center name link.
Open Support Center Category
Click the category name link.
Remove Support Center Article
To remove an article, click the article's Options icon [1]. Then click the Remove from category link [2].