HI Jim,
Thank you very much for using Syncfusion products.
To set the excel document to fit into one sheet we need to set the ExcelToPDFConverterSettings LayoutOptions property to settings.LayoutOptions = LayoutOptions.FitSheetOnOnePage.
We have prepared the sample at our side for the same and attached here for your reference. Please try the attached sample at your side and let us know if these helps you.
Please let us know if you require any further clarifications.
Regards,
Sridhar.S
CS-ExcelTOPDF_8b9280c6.zip