Hi @whunter2 ...
Depending on the version of the Rich Content Editor you are using, you'll want to check out either of these Guides:
- How do I use the HTML view in the Rich Content Editor as an instructor?
- How do I use the HTML view in the New Rich Content Editor as an instructor?
Make sure to pay attention to the information in the blue box of each of those Guides. There is a PDF file attached which contains a whitelist of allowable HTML tags in Canvas. Not all HTML tags are allowable in Canvas.
I hope this helps, Wendy. Sing out if you have any other questions about this...thanks! Take care...be well...stay safe.