[R] change font size within the panel.text function (package lattice)

[Luigi Marongiu]

Dear all,
I am adding some text to the panels of a graph generated through the
lattice function using the argument:
   xyplot( ...,
              panel =
               function(x, y,...)
               {
                   panel.xyplot(x,y,...)
                   panel.text(0,0,labels=V[panel.number()])
               }

How can I regulate the font size of such text?

Best regards
luigi