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Guides
Custom Viewer

Customize PDFViewCtrl

PDFTron SDK uses a viewing UI component developed in-house that you can customize.

Customizing Xamarin PDF viewer with PDFViewCtrl

This tutorial only applies to Xamarin.Android. See Xamarin.iOS equivalent here .

The PDFViewCtrl has a large API set that can be used to control how the PDF is presented to the user. This guide highlights some of the most commonly used functionality.

If you are using a DocumentActivity (or PdfViewCtrlTabHostFragment2), the contained PDFViewCtrl can be customized through PDFViewCtrlConfig .

Customize the viewing experience

Properties and methods

APIDescription
SetPagePresentationModeSet how pages are presented and scrolled: in 1 or 2 columns, scrolled vertically or horizontally
SetPageViewModeSets the zoom level relative to the page size, fit-width, fit-height or fit-page.
SetPageRefViewModeWhen a document is scrolled via horizontal swipes, use this method to control what zoom level new pages are rendered at.
SetClientBackgroundColorSets the color that is seen around pages.
SetupThumbnailsControls how low-resolution thumbnails are handled. Enlarged thumbnails are used in place of high-resolution content while the high-resolution content is being rendered.
SetProgressiveRenderingControls how frequently the high-resolution content is updated while it is being rendered.
SetDrawAnnotationsControls if annotations are visible.
SetHighlightFieldsControls if form fields are shaded with light blue.
SetOverprintControls how PDFs that use overprint colors are rendered.
SetColorPostProcessModeCan be used to turn on night-mode and other color processing changes.

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