[aleding]

WrongSizeGlass,

I am aware of that functionality but I find it easier to use the triangles vs. the method you describe. Also, my expectation with your method would be that all sub-sections are expanded, not just the current section - but again, that's my specific intuitive expectation.

Having the rotating triangle at each level where children are present is much more intuitive to me being that it would then mirror what exists in the body of the document.

FWIW