How to password protect a PDF on Android
What a PDF password actually encrypts, how to add one on an Android phone, how to choose a password worth using, and why a protected file has to be the last step in your workflow.
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Guides for working with PDFs on Android
Longer explanations of the problems people run into with PDF files on a phone, and what to do about them.
How to reduce PDF file size on Android
What actually makes a PDF large, the two points where you can control its size on a phone, and why some documents refuse to shrink no matter which compression level you pick.
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