figures position

[LEGRAND Jean-Marc]

Hi, and thanks for your previous help : figured bass has much less secrets for 
me !

I've still got a pb : my figures are printed above the bass line, which is what 
I wanted. But the
figures line is much too high, and I'de like to lower it. Do you have any trick 
for this ?

I've copied the manual to print the figured bass, but I don't understand the 
use of the setting :
          \property Voice.TextScript
          \set #'baseline-skip = #'0.2

When I chage the value to 1.4 or 4, nothing chages...

Regards