If you click on a checkbox of an expanded section in the "use these sections" option of the Print/Export panel, it only selects that one section.
If you want to include the subsections, you have to click on each one of them in turn. It would be nice if there were a way to click on the main section checkbox and include all subsections with it all in one fell swoop. Maybe if the section is collapsed it should include all subsections by default. Or maybe there should be a way to force it to select all subsections when you click in a certain way (e.g., Ctrl+Click).
