fine-tuning Lyrics size

[Werner LEMBERG]

Folks,


using 

  \override LyricText #'font-size = #'-1

to make the lyrics smaller is too coarse for me.  In my particular
case, there is both Italian lyrics and a German translation (using a
cursive font shape), and I have to make the cursive text just a bit
smaller.  AFAIK, LilyPond converts all font sizes into discrete steps
(6 steps is a factor of two).  How can I circumvent that?


    Werner