Trying to achieve: I am trying to include all selected headings in image3 as subheadings of the "5.3. Technical flow" heading - basically the numbering should change and the collapsing should work (i.e. when I collapse heading 5.3. all subheading should disappear, because they have been collapsed)
Issue: When I collapse all the headings in my document, you can notice in image1 that this is problematic. I think this is because of the two pages in image2 containing some images, because these have the two-column format.
How could I achieve what I wish? I checked this thread and asked much the same question a couple of days ago, but they didn't really help.
