🚀 go-pugleaf

>- how to describe the width of the bookmark pane,

Acrobat does somehow store this as a preference, but I don't think it
has any external method, nor PDF related method
>
>- how to make the font size in the bookmark pane smaller

No control over bookmark fonts.
>
>- how to put tabs into bookmark strings to neatly align them

Nope.
>
>- how to hide the menu and command bars

A PDF file CAN set open options to do this. See the Viewer Preferences
Dictionary in the PDF Reference.
>
>- how to control the document pane for port/landscape pages, etc

Not sure I understand that one.

>While at it, could I suggest to re-write this whole document by
>someone who not only knows his stuff but also knows how to present
>it to people other than his expert buddies (who don't need the
>book anyway)?

Well, experts do need a reference... one key point is that you really
need to know the PDF format itself; the pdfmark is just a way of
accessing it.

Aandi Inston