Hiding empty staves

[Andrew Longland-Meech]

Hi all!

I'm using \RemoveEmptyStaffContext to 'French' a piece that I'm
typesetting, but the first system still shows the empty staves. In the
manual section on hiding empty staves it states "...If empty staves
should be removed from the first system too, set remove-first to true in
VerticalAxisGroup.
        \override Score.VerticalAxisGroup #'remove-first = ##t   "

I don't understand where this should go. Is it in the \score section? Or
in the \layout section? Or in with the notes? Please can someone guide
me in the right direction?

Regards

Andrew

ps Lilypond is a great piece of software. Many thanks to all involved.