@amjad.sahi, @Professionalize.Discourse, @John.He, @simon.zhao
Worksheet.PageSetup.PaperSize = PaperSizeType.Custom;
// Set custom paper size for A1 (width: 33.1 inches, height: 23.4 inches)
Worksheet.PageSetup.Custom…...zhao worksheet.PageSetup.PaperSize = PaperSizeType...inches, height: 23.4 inches) worksheet.PageSetup.CustomPaperSize((150))...