smaller Text at CueVoice

[Alexander Weidner]

Hello,

how can I get a smaller fontsize for text under a CueVoice?

I tried 

\font-size = #-2 

and other things,  but it did not work.

Cheers! Alexander

<<

      \new CueVoice = "Hirte" {

\relative c'' {

\autoBeamOff \stemUp

   s4 s8 a16 a16 d8 d8 r16 d16 d16 e16 |%T1

       }

      \new Lyrics \lyricsto "Hirte" {

        \override Lyrics.font-size = #-3

         Naht der Him -- mel?

         Bin ich im Him -- mel?

       }

>>