I'd like to VIEW the customized completion page to see how it looks (or if it needs to be adjusted) in the same way that I can view any other aspect of the curriculum (by clicking preview like a student). I can't figure out how to view it exactly as it would appear once a student finishes 100% of the course.
To preview your custom completion page, you can use the Preview As a Student mode. Then simply go through the course and complete every lesson until you achieve 100% completion. If your course is very long you can simply create a new course and copy and paste the completion page to test it out.