When a PDF is opened, its actual background color is often white. On Windows, several PDF viewers have the ability to set the background color to another one, which doesn't modify the PDF file itself. You can just think that it adds a virtual color when a file is opened by those software. But when you open the same file by other softwares, it still has white background.
I often need to read many articles (PDF format) a day, and white background make my eyes feel uncomfortable.
Does Preview have the same feature? Or any plugin to do this?