In VisualEditor would exist the option: Insert > New Section, if you go to the end of the section, bellow which you want to put the new one. --
Another way is using a floating element and put it in the place where the new section is going to be. Or simply, click in a button "New section" and click in the place of the text where the new section is going to be (then would appear a floating bar with the text. "Is it in the correct place?. [Yes] / [No]" (in any case, writting a text in the place would disappear this floating bar / message).
