since 2007 finale updates the layout before printing: check your undo
menu after printing. you are right that locking the systems will
avoid this behaviour, but the spacing in some cases will be different
post-printing in comparison to what you were looking at before
sending to print, but this will only happen when your score NEEDS an
update (you have changed some things that are not reflected visually
until updating). i think it is always best to lock systems anyways,
for various reasons, and always do so after doing the most basic
layout planning.
I have had the page layout -- that is, the number of measures in a
certain system, and hence the flow of measures across pages --
differ in the printed version from what appears on screen. Printing
to PDF looks the same as printing to my physical printer, so it's
not an issue with the print driver. The solution has been to lock
all of my systems before printing, to make sure that there are no
surprises.
I have assumed that this is some kind of rounding error in which the
higher printer resolution compared to screen resolution allows
Finale to squeeze one more measure into a line as it prints, thereby
throwing off the flow of the following measures. I'd guess the
conditions for this are fairly rare -- it requires a measure which
could just barely be fit onto the previous system if calculations
are made at at 600dpi but which would not fit if calculations are
done at 96dpi. And I believe I've only seen it in Fin07. But I'm a
little surprised that the Finale printing algorithm allows for any
reflow at all, rather than just sending to the printer exactly what
is seen onscreen.
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