The main "Menu" shown on the left side has folders inside it (consisting of subdirectories) — partly to save "space" in the layout presentation. Is there a way to collapse it further, so that the entire main Menu would appear like the "drop down" Search module (top right)? That is, without "destroying" the sub-folders (and their sub-directories) in the main Menu?
Also, how do you make the drop down options, just like the choices in the Search module (top right)? I guess, the main clarifications for these are: What is the difference between "section" vs "sorted section"? (I did not see any noticeable difference.) What does "separator" do? What should be the choice so we can create the "drop down" menu?
I already got the function of "option" — chosen to place some subdirectory inside a section, for example.