AccessPermissions

PdfOptions.AccessPermissions property

包含一组标志，指定在打开文档时应授予哪些访问权限 具有用户访问权限。请参阅PdfAccessPermissions。

public PdfAccessPermissions AccessPermissions { get; set; }

例子

[C#]
var pdfOptions = new PdfOptions();
pdfOptions.Password = "my_password";
pdfOptions.AccessPermissions = PdfAccessPermissions.PrintDocument | PdfAccessPermissions.HighQualityPrint;

using (var presentation = new Presentation())
{
    presentation.Save(pdfFilePath, SaveFormat.Pdf, pdfOptions);
}

也可以看看

PdfOptions AdditionalCommonFontFamilies