rulers don't correspond to page size
When I turn on rulers (horizontal and vertical) the scale is incorrect. The horizontal ruler says the screen is 11 inches when the page is printed it is in fact less than 8 1/2. The vertical ruler shows 12 1/2 when it prints it is actually only about 9 1/2 inches. As is it is totally useless in laying out the information.
I can't find any place to correct this. Preferences is limited to metric or english.
Before you answer please know that I am not talking about putting a ruler to the screen. I understand the concept of scalability. I just want the ruler to work in numbers like it does in pages. When I format the page size it shows what fits on an 8 1/2 x 11 inch piece of paper.
Thanks in advance
ehw
iMac (27-inch, Late 2013), OS X El Capitan (10.11.5)