[PdfDigitalSignatureAppearance.DigitalSignedLabel property 获取或设置数字签名标签。默认值:“数字签名者”. public string DigitalSignedLabel { get; set; } 也可以看看 class PdfDigitalSignatureAppearance 命名空间 GroupDocs.Signature.Options.Appearances 部件 GroupDocs.Signature]