Hi AndresM-6995,
Welcome to our Microsoft Q&A platform!
Actually, SfPdfViewer provides the property "IsToolbarVisible". So if you want to hide toolbar, only need to set its "IsToolbarVisible" to "false".
<syncfusion:SfPdfViewer x:Name="pdfViewerControl"
InputFileStream="{Binding PdfDocumentStream}"
IsToolbarVisible="False"/>
Regards,
Kyle
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