PDF margin growth

[Kent Kostuk]

I have noticed that when I create a PDF and thend print it the margins 
are larger (and consequently the text is smaller) than if I printed the 
document directly.  I don't have this problem when I create and then 
print a PS file.  This is not strictly a LyX problem, as I have noticed 
this when I create the PDF from a PS at the command line.  Is thers some 
command line parameter that I need to be using to correct this?

Kent