To properly sign a PDF on your Android phone or tablet, you'll need to download an app from the Google Play Store.

You have the option to convert Google Docs into PDFs and either save them to your computer or send them as an email ...

Settings may vary depending on your Android phone’s manufacturer. Open the file in the default app. Tap the Share icon. Tap Print. Tap the PDF button to download it. On iPhone, you can save a file as ...