don't use page background color when PDFView does not support it, apparently on 10.12 this is not supported anymore
don't use page background color when PDFView does not support it, apparently on 10.12 this is not supported anymore

JackieXie168/skim,JackieXie168/skim,JackieXie168/skim,JackieXie168/skim,JackieXie168/skim