reNightDuotone 저시력 렌더 옵션에 사용되는 paper 색상을 제어합니다property NightDuotonePaper: TColor;
When reNightDuotone is present in Options, TPdfView maps rendered page luminance onto NightDuotoneInk and NightDuotonePaper before overlays are painted
Assigning this property invalidates the view immediately when reNightDuotone is active
clBlackPdfView1.NightDuotonePaper := clBlack;
PdfView1.Options := PdfView1.Options + [reNightDuotone];