increase space between system staves

[steve berthiaume]

hello,

i have my blank score sheet almost perfect, just need to increase the space between the staves so the clefs don't overlap.  when i insert \override Staff.VerticalAxisGroup #'minimum-Y-extent = #'(-5 . 5) within "/new StaffGroup", it increases the space between systems instead of the staves.

wrong place, wrong command, or wrong hobby?

thanks,

steve

\version  "2.10.20"     

#(set-global-staff-size 24)
#(set-default-paper-size "letter")
\layout{ indent = #0 }

     emptymusic = {
    
       \repeat unfold 4 % Change this for more lines.
       { s1 \bar "|" s1 \bar "|"s1 \bar "|"s1 \bar "|"\break}
       \bar "|"
     }
     \new Score \with {
       \override TimeSignature #'transparent = ##t
     % un-comment this line if desired
     %  \override Clef #'transparent = ##t
    
       defaultBarType = #""
       \remove Bar_number_engraver
     } 

<<
    \new StaffGroup

    <<
     
     % modify these to get the staves you want
       \new Staff  \emptymusic
    \new Staff {\clef "G_8" \emptymusic}
    \new Staff  {\clef "G_8" \emptymusic}
    
     >>
>>