As you might have noticed, PDF Viewer doesn't have a manual save button. That's because you don't need one, as PDF Viewer automatically saves your files!PDF Viewer for Android
PDF Viewer saves your files when:
- Closing the document
- Switching to a different document
- The application is moved to the background (e.g. by pressing the home button)
- Tapping the activity button
- The configuration has changed (change of device orientation, locale, added keyboard, etc.).
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