RE: Distance between staves

[Fairchild]

Feature request - -

Several recent threads demonstrate a desire for absolute control of vertical
spacing.  

Available defaults and overrides normally create wonderful layouts, but
there are instances where they frustrate user efforts to effect specific
vertical spacing.  Currently available handles include betweensystempadding,
betweensystemspace, Staff minimumVerticalExtent, and careful use of \raise
as in \markup { "" \raise #n "" }.  Only the awkward markup construct is
line specific.  In combination, these behave somewhat unpredictably.

The need is an ability to dictate precise vertical layouts, line by line,
even if this provides control ad absurdum.

                                          - Bruce