To add a section to a meeting look for the "+ Section" on the left hand side of an open agenda and click on it.
Notes:
+ Section is found underneath every section
You can add as many sections as you need.
You can add agenda items to a meeting up until it has been confirmed.
Click on the Context menu (3 dots) at the end of the section header to edit the header title, move the entire section up or down or delete
Related Articles:
Deleting an Agenda Section
Adding an Agenda Item