We’re excited to announce the release of version 9.1.0 of our Android PDF SDK introducing three powerful new capabilities bound to help your Android users be more productive and do more with their documents. These include:
- Custom styles in free text annotations
- Annotation in reading mode
- Search in the navigation list
This post covers the most significant 9.1.0 changes. Head over to the changelog for the full list of fixes and enhancements!
Custom Styles in Freetext Annotations
With this release, users can now define custom fonts they wish to use for free text annotation through two newly added APIs:
As a result, it’s now possible to style a free text annotation with custom font, stroke, and fill, allowing users to create more beautiful free text annotations with ease.

Text Markup Annotations in Reading Mode
Next, version 9.1.0 also brings support for adding and modifying the text markup in reading mode. After making a text selection in reading mode, the user can add a highlight, underline, strikeout or squiggly annotation, and modify the styles such as color and opacity, or delete them through the bottom style dialog.

Search in the Navigation Lists
When working with large files with a high number of annotations, bookmarks, and outlines, it can be very helpful to be able to search among them. With this update, it’s now possible to search among annotations, bookmarks, and outlines through the top toolbar.
Search in Annotation List | Search in Outline | Search in User Bookmarks |
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Visit the changelog for PDFTron 9.1.0 for Android to see the full list of other UI improvements.
New Customization APIs
Lastly, we also rolled out some popular customization API requests to make you more productive. Here are a few examples:
- New API to hide annotation review state
- New API to hide annotation of a certain type in the annotation list
- New API to hide the preset bar for certain tools
Wrap Up
We hope you’re as excited as we are about 9.1.0's new additions! You can see them in action today by visiting our live Android showcase .
We’ve got a lot more planned down the road. As always, we’d love to hear your feedback on what we can focus on to deliver the most value to your organization and users. Please let our developers know your thoughts; contact us with any questions or suggestions.