With sections, you can create a table of contents within lesson and documentation activities. You create folders within the activity, which contain content parts and/or questions. 

For the learner, it is visible in the course overview. 

And on the left-hand side within the activity. 

The sections form links, which directly bring the learners to the relevant content.

To set this up, click on Edit next to a Lesson or Documentation activity. 

Select the content you want at the tab Activity content to place in a section and click . Using this option, you can also remove content from sections or place them in a different section. 

A section can be removed by selecting More and then delete it in the activity content overview.