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Download PDFTron SDK
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Quick start - view a document

Integrate with NuGetIntegrate manuallyAdd license keyPermissions (Android)Run samplesUpdate to latest version
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Xamarin.Forms

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Fundamentals

Java binding (Android)Objective-C binding (iOS)Code sharingDocument lockingDocument saving
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Document Viewer

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Xamarin.Android

OverviewShow a document in an ActivityShow a document in a FragmentViewer configurationToolManager configurationDay and Night themes
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Xamarin.iOS

Open from online URL
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Document Viewer components

Overview
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PDFViewCtrl

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Reflow

Quick menuCustomize quick menu
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Annotation toolbar

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Annotation style editor

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Page slider

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List container

Xamarin.AndroidXamarin.iOS
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Annotation list

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Document outline

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User bookmark list

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Thumbnail browser

Add pages dialogCrop pages dialogRotate pages dialogView mode dialog
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Annotation and collaboration

OverviewToolManager setupRead only mode
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Disable annotation creation and editing

Xamarin.AndroidXamarin.iOS
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Default annotation properties

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Change tool mode

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Events

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Override annotation handling

Show and hide existing annotationsRealtime collaboration
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Advanced customization

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Add a custom view to a page

Xamarin.AndroidXamarin.iOSCreate a custom toolPage color modePage fit modePage layout modeScrolling direction
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Conversion

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Convert documents to PDF

Xamarin.AndroidXamarin.iOS
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Convert HTML to PDF

Xamarin.AndroidXamarin.iOS
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Parsing and extraction

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Digital signatures

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Form filling

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Search

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Text search

Xamarin.AndroidXamarin.iOS
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Redaction

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Advanced topics

PrintUnderstand coordinatesGenerate page thumbnails
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Reference

LocalizationIcon cheat sheet
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PDF Processing API

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Page fit mode

In this document
chevron_rightPage view modes
chevron_rightSet the default page fit mode
chevron_rightSet the page fit mode dynamically

PDFViewCtrl's page view mode controls the default zoom level of pages and documents. New documents will automatically open at the zoom level specified by the mode.

linkPage view modes

PDFViewCtrl supports the following page view modes:

Page view mode (Xamarin.Android / Xamarin.iOS)DescriptionScreenshot-portraitScreenshot-landscape
PDFViewCtrl.PageViewModes.FitPage / pdftron.PDF.PageViewModes.e_fit_pageThe zoom is set so that the entire page is visible without scrolling.
PDFViewCtrl.PageViewModes.FitWidth / pdftron.PDF.PageViewModes.e_fit_widthThe zoom is set so that the page's width matches the viewer's width.
PDFViewCtrl.PageViewModes.FitHeight / pdftron.PDF.PageViewModes.e_fit_heightThe zoom is set so that the page's height matches the viewer's height.
PDFViewCtrl.PageViewModes.Zoom / pdftron.PDF.PageViewModes.e_zoomThe viewer's zoom is not adjusted based on the page.

linkSet the default page fit mode

You can set a default page fit mode in your PDFViewCtrl by using PageRefViewMode property.

linkSet the page fit mode dynamically

If you want to dynamically change the page fit mode, use PageViewMode property. Note that when the user flips the page, the page view mode will be automatically reset to the default mode set by PageRefViewMode.