You may choose to "Favorite" certain courses in your Courses list - this results in only the "Favorited" courses showing up in your Canvas Dashboard. Non-favorited courses will be hidden.
NOTE: Once you have favorited a course, NEW courses that you are enrolled in WILL be automatically added to your favorites.
Please see the link below for more information:
How do I customize my Courses List? https://community.canvaslms.com/docs/DOC-1288