To save annotations in your file, please follow the instructions below:
1. Open file with PDF Reader Pro for Android;
2. Tap the Annotations icon at the bottom of the screen based on your need. Add your annotations and any changes will automatically save in the file;
3. Or tap the Save button to preserve annotations;
4. Or tap <- button and all your changes are automatically saved even if you leave the app.
If you open your PDF file through a third-party app, such as email, or Dropbox, the annotations you made are will not be saved. You need to download your file to the local folder first. Then open it with PDF Reader Pro, and it will automatically save all changes you make to the files.
To learn more about PDF Reader Pro's advanced features, click here! Click here to download PDF Reader Pro for Android for free!