is possible to set fingerOrientation for one voice ?

[Allan Spagnol Comar]

Hi lilypond list, I was wondering if it is possible to set
fingerOrientation to one voice, I had re written Bach Bourreé and I am
having some trouble to set finger orientation, I got fingers on every
compass and set position one by one is real hard, considering that I
want the full melody to get finger left and the bass to get finger
down ....

Is a way for doing this ?

Thanks, Allan

--
An application asked:
"Requeires Windows 9x, NT4 or better",
so I´ve installed Linux