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985896: Include notes on the custom font limitation on form fields #1531

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Oct 10, 2025
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985896: Include notes on the custom font limitation on form fields #1531

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4 changes: 3 additions & 1 deletion Document-Processing/PDF/PDF-Viewer/blazor/form-designer/custom-font.md
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Expand Up @@ -44,6 +44,8 @@ To ensure proper rendering and saving of form fields that use custom fonts, espe

[View sample in GitHub](https://github.com/SyncfusionExamples/blazor-pdf-viewer-examples/tree/master/Common/Custom%20Font%20Support%20For%20FormFields).

>**Note:** If a form field (TextBox, ListBox, DropDown) using a custom font has text larger than the field’s bounds, the downloaded PDF may render incorrectly in browsers or third‑party viewers. It displays correctly in the Syncfusion SfPdfViewer. To avoid this, use a font size that fits within the field or enlarge the field before saving/downloading.

## Custom Font Support for Signature Fields

The Blazor SfPdfViewer allows loading, editing, and saving custom fonts in signature fields by using the [FallbackFontCollection](https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.SfPdfViewer.PdfViewerBase.html#Syncfusion_Blazor_SfPdfViewer_PdfViewerBase_FallbackFontCollection) and [SignatureFonts](https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.SfPdfViewer.PdfViewerSignatureDialogSettings.html#Syncfusion_Blazor_SfPdfViewer_PdfViewerSignatureDialogSettings_SignatureFonts) properties.
Expand Down Expand Up @@ -109,4 +111,4 @@ The following example illustrates how to load custom fonts in FreeText annotatio

## See also

* [Load Custom Fonts in PDF Viewer](../faqs/how-to-load-custom-font-pdfium)
* [Load Custom Fonts in PDF Viewer](../faqs/how-to-load-custom-font-pdfium)