Page Layout problem at print

Hi,

I have OpenOffice 4.1.1 running on Mac Yosemite, printing with an HP Photosmart D7460.

I have set up a brochure with page size formatted to 5.5 X 8.5 to print side-by-side on letter size paper.

The print preview shows that the pages and paper orientation are correct, but the page only covers about 2/3 of the paper!The pages are 6 3/8 inches high instead of 8.5, and 4 1/8 inches wide instead of 5.5.And, the top margin of the pages is cut off.What am I doing wrong?

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:

https://forum.openoffice.org/en/forum/viewtopic.php?f=17&t=73675

compliance management solution video

Thank you.