# GrapeCity.Documents.Excel.XlsxOpenOptions.DigitalSignatureOnly

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<h1 id="GrapeCity_Documents_Excel_XlsxOpenOptions_DigitalSignatureOnly_" data-uid="GrapeCity.Documents.Excel.XlsxOpenOptions.DigitalSignatureOnly*">DigitalSignatureOnly Property
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<a id="GrapeCity_Documents_Excel_XlsxOpenOptions_DigitalSignatureOnly_" data-uid="GrapeCity.Documents.Excel.XlsxOpenOptions.DigitalSignatureOnly*"></a>
<h4 id="GrapeCity_Documents_Excel_XlsxOpenOptions_DigitalSignatureOnly" data-uid="GrapeCity.Documents.Excel.XlsxOpenOptions.DigitalSignatureOnly">DigitalSignatureOnly</h4>
<div class="markdown level1 summary"><p>Indicates whether to open the workbook in digital signature only mode.</p>
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In the digital signature only mode, existing signatures will be preserved 
unless you called <a class="xref" href="GrapeCity.Documents.Excel.ISignature.Delete.html#GrapeCity_Documents_Excel_ISignature_Delete">Delete()</a>. 
But you can only sign existing signature lines, add invisible signatures,
remove digital signature of signed signature lines,
or remove invisible signatures in this mode. Other changes will be discarded.
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After modifying digital signatures, you need to save the workbook to commit changes.
</p><p><a href="https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool">true</a> to open workbook in digital signature only mode.
Otherwise, use normal mode.
The default value is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool">false</a>.
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public bool DigitalSignatureOnly { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Property DigitalSignatureOnly As Boolean</code></pre>
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