How to add frame (frame.plot=T) to Plot.Design?

Hi R-help,

 

When using the package Design and the plot.Design function all the graphs of
an lrm.fit (lrm()) are plotted without a frame (only with axes). How can the
frame be added to these plots?

 

In the plot.default function the frame can be added/or removed via the
frame.plot=T/F, respectively.

e.g., plot(1,axes=T,frame.plot=T). How can this be done with
plot.Design(lrm.fit)

 

Thanks,

Jan