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The zooming functionality of the PdfViewer allows you to zoom in and out the document to take a close-up view or to see more of the page at a reduced size.

The control can be zoomed by using the buttons in the toolbar component, or through the ScaleFactor property of the PdfViewer. The ScaleFactor works with relative units where 1 is the default zoom level. Increasing the value will zoom in and decreasing it will zoom out.

Zoom out

this.pdfViewer.ScaleFactor = 0.5; 
A document zoomed out to 50%

WinUI RadPdfViewer

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