verticalExtent and minimumVerticalExtent

[Fodor Bertalan]

I founded some important but not very well documented feature. It is
important when you use G_8 clef with lyrics, because using the same
minimumVerticalExtent, the lyrics won't be in the same distance from the
staff, as with a G or F clef (it is because the 8 in the clef).

If you want to set the vertical extent of a staff independently of the
staff's contents you can use the property verticalExtent but it is limited
to values set by minimumVerticalExtent, unless the latter is set to ##f.

So to have any vertical extent of your choice you should write:

\set Staff.minimumVerticalExtent = ##f
\set Staff.verticalExtent = #'(-4 . 6)


Bert