Board Thread:Support Requests - Getting Technical/@comment-25959928-20180223170151

Lately I have been trying to learn how to create and style custom portable infoboxes. I have learned I can style them using CSS on my common.css page however, I also learned I can apply custom themes to infoboxes. My question is for more information on creating and applying these themes because I can't quite exactly figure out how to make multiple themes. (I'm an idiot) If anyone can enlighten me it would be very helpful. 