When you first create a list you will be alerted that the list is empty. Click on the section link to add the first section.
To add further sections to the end of your list, you can use the mouse/ touchpad to move the action bar to the end of your list and click on the ADD SECTION link.
When adding a section between other sections, place the action bar at the top of the section to add the new one above.
To add a subsection, place the action bar within the main section.
You can move a section by clicking on the section edit menu and selecting Cut from the drop-down menu. Then place the action bar in the place you want the section and click on the Paste link.
It is also possible to add and move sections using the options in the section and item edit menus.