I was recently asked why margins kept distorting(getting larger) when printing using the amyuni driver resulting in tiling. It is important to remember that when creating pdfs the plotter settings do not have any bearing on this. You must set the margins you want in the Amunyi driver settings.
Go to File, Print.
chose "Print setup"
"Advanced Options" tab
where it says "Physical Margins (set in Millimeters)" enter 0 for both horizontal and vertical.
The result is that it will use the margins of your master without adding increasing your margins.
Now I just have to learn how to spell Amyuni.
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
"Implementing Successful Building Information Modeling"