How to remove default webkit margins on printing

I’m trying to print a simple php page.
With Trident everything works fine, but when I try to print the same file with webkit a default 1cm margin appears on all sides.

I tried to remove it by css:
but nothing works.
I use window.print();

Are there other solutions, maybe with ExeOutput internal code?
Thanks!

The webkit engine in ExeOutput 1.7 had only basic printing support. You’ll have to wait for ExeOutput 2 for enhanced printing support.