Print Forms

I downloaded the power pack 3 and started using the print form feature that prints the form exactly as it is.
But the problem my form is full screen and i use A4 Printing Paper.
Only part of the form is getting printed , i even shifted to landscape mode. but even then its not completely printing.
How do i make it print the complete form in one page, I dont any margins , i can use every edge of the page.

So how do i change the margins??