This course format looks very similar to Topics format except:
- there is no parameter "Number of sections", sections can be added and removed as necessary
- section can also be added inside another section
- each section (regardless of its nesting level) can be shown expanded or collapsed. Teacher can change it in edit mode.
- If section is displayed collapsed, it's name is displayed as a link to the separate page and on this separate page the link "Back to ... " is displayed
If teacher hides a section all nested sections and activities become hidden as well.
Please note that if section has both activities and subsections activities are displayed first.
On the attached screenshots the section "Assignments" has Label resource and two subsections - "New assignments" (displayed expanded) and "Old assignments" (collapsed). Note how course navigation looks like in this case.