MacOS – How does Preview calculate to display PDF when I select View / Actual Size

macospdfpreview

I switched from a Samsung 2493HM to a Crossover 2720MDP monitor. In testing, I opened PDF in OS X Preview (I am on Mountain Lion) and found that by default, the display size is very small, like this:

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Notice that I chose View / Actual Size (command-0). Normally the Preview tries to render the page to sized like a piece of paper.

On this new monitor, a page renders to a size around 2 credit cards.

Where can I find the controls to get OS X to understand display pitch correctly and therefore allows Preview to view actual size correctly?

Best Answer

I switched from a DVI-D dual link DVI input, to DisplayPort Input. The monitor supports HDMI, DVI, DP and analog inputs.

OS X was able to determine the screen DPI on DP. I open a PDF and choose View/Actual size, the size looks right now.

I do not know why DVI does not work. I can provide the ioreg if anyone is interested to investigate further.

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