Hello there, @igogbonna ...
The Rich Content Editor (RCE) can be found several places in your course: Announcements, Pages, Assignments, Discussions, Quizzes, etc. I would first suggest that you review either of these two video tutorials (depending on which version of the RCE your school has enabled):
Once you have reviewed these tutorials, there are a bunch of written Guides available to you...again depending on which version you want to know more about:
I hope that these resources will be of help to you. Please let Community members know if you have any questions about this information...thanks!
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