Return to the to the course settings screen (if you're not sure how to do this please see the section Getting Back to the Course Settings Screen covered earlier).
From the Format options, choose Topics format or Weekly format. For mine, I'm going to choose Topics format:
3. Choose the number of topics/weeks. I've planned for 5 topics in my course.
4. For weekly courses, make sure you set a start date.
5. Now, click on save and return to the course homepage.
Note
You can still adjust the number of topics/weeks in your course once your course is populated with content. However, if you reduce the number, then later topics will disappear. So, if you have 10 topics, and later reduce it to 8, anything that you had added to topics 9 and 10 will vanish.
You can also switch from weekly to topic view any time you like.