feature request: Tabs and Sub-tabs instead of sections; simpler organization of data

[CaliforniaSymphony]

For quick navigation purposes I'd like to see Tabs and Sub-Tabs instead of sections spaced vertically one after another. I'll attempt to illustrate my idea in text only examples.
__ = Bottom edge of row of tabs or sub-tabs.
[ ] = Selected tab or sub tab.
{ } = note of suggested non-tabbed contents

The first example is of Sheet Music/Scores selected. Further examples follow the same idea.

__ [ Sheet Music ] __ Recordings __ General Info __ Categories __
__ [ Scores ] __ Parts __ Arrangements & Transcriptions __



__ Sheet Music __ [ Recordings ] __ General Info __ Categories__
__ [ Commercial ] __ Creative Commons __ Free* __ Synthesized / MIDI __


__ Sheet Music __ Recordings __ [ General Info ] __ Categories __
{list general info**}


__ Sheet Music __ Recordings __ General Info __ [ Categories ] __
__ {collapsible hierarchy of categories instead of a long list of every possibility} __


* see second example. "Free Recordings" for some reason is listed after "Sheet Music" as opposed to being part of "Performances." I fail to understand the difference between commercial, creative commons and free recordings that would require a separate section for Free. It also makes no sense to have recordings both before and after Sheet Music. I presume this is intentional as this is how they are listed for several standard works I've just found:
https://imslp.org/wiki/Serenade_for_Str ... ky,_Pyotr)
https://imslp.org/wiki/Symphony_No.7%2C ... udwig_van)
https://imslp.org/wiki/Symphony_No.2,_O ... n,_Robert)

** see third example. To me the concept of General Info is oddly divided into some primary info at the top of the page, further hidden info at the top of the page which is related to categories, then the General Info section which comes toward the end of a page, followed to more different categories info which is not collapsed like the top of the page. Perhaps there's some underlying logic here. But I don't see why general reference information about a work shouldn't all be grouped together in one area.


Thanks for considering.
Drew Ford, California Symphony Library