Foxit Mobile PDF SDK 4.0 includes great improvements to the UI Extension component of the RDK. With the new version, developers can not only create a full-featured PDF Reader with a few lines of code but also fully configureĀ the UI through the .JSON file included in the package.

About UI configuration

For the first time, in 4.0, the UI extensions component provides a new class called PDFReader. This class provides a full reader with a pre-built UI which includes enable/disable, show/hide customization options.

Have a look at the sample .JSON code below.


"defaultReader": true,
"modules": {
"thumbnail": true,
"readingBookmark": true,
"outline": true,
"annotations": true,
"attachment": true,
"signature": true,
"search": true,
"pageNavigation": true,
"form": true,
"selection": true,
"encryption": true

Details of the configuration

defaultReaderChoose whether to use the default UI the product provides, other configuration will be ignored if defaultReader is false.
thumbnailEnable/Disable Thumbnail Mode
readingBookmarkShow/Hide Reading bookmark Panel
outlineShow/Hide Outline Panel
annotationEnable/Disable Annotation feature. All the annotation will be supported and the annotation panel will be shown if the value is true. All the annotations will be disabled and the annotation panel will be hidden if the value is false.
pageNavigationEnable/Disable Page Navigation
formEnable/Disable Form filling
selectionEnable/Disable Selection
encryptionEnable/Disable encryption
searchEnable/Disable Search feature
signatureEnable/Disable Signature feature


Read the in-depth feature description in our Knowledge Base