The Rich Content Editor is a simple, yet powerful, text editor that is available any time for creating new content (assignments, announcements, discussions, etc.). Although clean and streamlined, the Rich Content Editor is sophisticated enough to support embedding video content, math formulas, and other rich media.
How to use the Rich Content Editor
You can insert anything into the Rich Content Editor’s content area  that you can view in a web browser. You can switch between viewing your content as text or in HTML with the Switch Views link . Finally, you can insert existing content links, files, and images into your content with the Content Selector .
When you are finished creating or inserting existing content, be sure to click Save to save all your work.
How to use the HTML view in the Rich Content Editor
For more advanced page editing, you can toggle between the Rich Content Editor and HTML view when adding content. Use the HTML view if you are comfortable with embedding external content by configuring HTML code or tags or if you are familiar with HTML code or tags for advanced formatting options. For security purposes, you will see that certain HTML codes and certain copied and pasted content from external sources will not work upon saving.