How do i gett historical f- clef on third (middle) line

[anders stenberg]

Hello!

Got this problem when doing renaisance music editions and making an 
incipit in mensural notation. I some times have to get an f- clef on 
third (middle) line. With modern clefs this is easy: you use the 
"varibariton" command or a  "f3" command But when using historical 
clefs  mensural or petrucci that doesn't work as neither   
"petrucci-f3"  nor
 "mensural-f3" command works.
I did try to force it in warious other ways in  version  2.2.2 but 
didn't get it.  Haven't made any more complicated try's after upgrading 
to 2.4.2 .  As the precise clefing some times is a not negligable 
information source for some practical things for a performance I would 
like to get this.
Could somebody help me out. Could some body perhaps also fix things in 
later versions to get an  userfriendly  solution. Should be possible as 
the g and c- clefs have easy comands to get them on different lines in 
the historical fonts.

Anders Stenberg