The default setting in Canvas is to restrict editing of pages to instructors only. However, your instructor may allow you to edit a page in your course and contribute content to the page.
If you can edit a page, you can also view the history of a course page.
In Course Navigation, click the Pages link.
Pages is designed to open to the front page for the course, if there is a front page selected. Click the View All Pages button to select a page from the Pages Index.
Click the title of the page.
Click the Edit button.
Note: You will only see the Edit button if you are allowed to edit the page.
Edit content on the page using the Content Selector . You can also edit the content using the Rich Content Editor  or switch to HTML view to edit .
Note: Depending on your course setup, the Files tab may not display in the Content Selector.
You can notify users that content has changed by selecting the Notify users that this content has changed checkbox . Click the Save button .
View your changes.