Sign Pdf documents with special appearance

GroupDocs.Signature contains classes that implements for Pdf document special signature appearances.

Base signature options SignOptions contains property SignOptions.Appearance that expects instance of the following classes

PdfTextAnnotationAppearance class implements for Pdf documents signature as annotation area. Note that TextSignOptions.SignatureImplementation property must be set to TextSignatureImplementation.Annotation
PdfTextStickerAppearance class implements for Pdf documents signature as small sticker. Note that TextSignOptions.SignatureImplementation property must be set to TextSignatureImplementation.Sticker

Here are the steps to setup special Pdf document Text signature appearance with GroupDocs.Signature:

Create new instance of Signature class and pass source document path as a constructor parameter.
Compose object of TextSignOptions object with all required additional options.
Set TextSignOptions.Appearance property with PdfTextAnnotationAppearance object and set its properties
Call Sign method of Signature class instance and pass TextSignOptions to it.
Analyze SignResult result to check newly created signatures if needed.

Sign Pdf document with Text signature Annotation appearance

This example shows how to add Text signature to Pdf document with annotation look. See SignResult

using (Signature signature = new Signature("sample.pdf"))
{
    TextSignOptions options = new TextSignOptions("John Smith")
    {
        // set signature position
        Left = 100,
        Top = 100,
        // set signature rectangle
        Width = 100,
        Height = 30,
        // setup proper signature implementation
        SignatureImplementation = TextSignatureImplementation.Annotation,
        Appearance = new PdfTextAnnotationAppearance()
        {
            Border = new Border()
            {
                Color = Color.Blue,
                DashStyle = DashStyle.Dash,
                Weight = 2,
            },
            BorderEffect = PdfTextAnnotationBorderEffect.Cloudy,
            BorderEffectIntensity = 2,
            HCornerRadius = 10,
            // text content of an annotation
            Contents = "Sample",
            Subject = "Sample subject",
            Title = "Sample Title",
        },
        // set signature alignment
        VerticalAlignment = Domain.VerticalAlignment.Bottom,
        HorizontalAlignment = Domain.HorizontalAlignment.Right,
        Margin = new Padding() { Bottom = 20, Right = 20 },
        // set text color and Font
        ForeColor = Color.Red,
        Font = new SignatureFont { Size = 12, FamilyName = "Comic Sans MS" },
    };
    // sign document to file
    signature.Sign("signedAnnotation.pdf", options);
}

Sign Pdf document with Text signature Sticker appearance

This example shows how to add Text signature to Pdf document with sticker look. See SignResult

using (Signature signature = new Signature(filePath))
{
    TextSignOptions options = new TextSignOptions("John Smith")
    {
        // set signature position
        Left = 100,
        Top = 100,
        // set signature rectangle
        Width = 100,
        Height = 30,
        // setup proper signature implementation
        SignatureImplementation = TextSignatureImplementation.Sticker,
        Appearance = new PdfTextStickerAppearance()
        {
            // select sticker icon
            Icon = PdfTextStickerIcon.Star,
            // setup if popup annotation will be opened by default
            Opened = false,
            // text content of an annotation
            Contents = "Sample",
            Subject = "Sample subject",
            Title = "Sample Title"
        },
        // set signature alignment
        VerticalAlignment = Domain.VerticalAlignment.Bottom,
        HorizontalAlignment = Domain.HorizontalAlignment.Right,
        Margin = new Padding() { Bottom = 20, Right = 20 },
        // set text color and Font
        ForeColor = Color.Red,
        Font = new SignatureFont { Size = 12, FamilyName = "Comic Sans MS" },
    };
    // sign document to file
    signature.Sign(outputFilePath, options);
}

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App

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You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.

Sign documents with extra Digital Signature properties Sign Pdf documents with custom digital signature appearance