@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…...on style Aspose.Cells Product Family cells-net , aspose-cells imparthgalani...explains how to use the C# API or .NET Library sample code to set custom...