When signing documents, like PDF files, you can use the free Microsoft Office app available from the Apple App Store or Google Play store.
Once installed, the app will appear like the following. I’m using an Apple device for this demonstration, but the Android version is quite similar.
To start the signing process, click the Actions button (lower-right).
This reveals many wonderful features of the Office App. We are interested in the “Sign a PDF” action.
Locate the PDF. If the PDF is not listed in your recently opened files list, select Browse to navigate to your OneDrive or SharePoint site, or to a folder on the device itself.
Once you have located the document, open the PDF, then scroll to where a signature is required. Tap the location in the document you wish to add your signature.
If this your first time using the app, you will be presented with a new screen where you can use your finger or digital stylus to write your signature in the same fashion as using pen and paper.
NOTE: Not my real signature. Don’t get any ideas. 😊
You can customize the signature color to one of three colors (black, green, or blue).
When finished, tap “Store Signature” at the bottom center of the screen and click Done at the top right of the screen.
With your signature saved in the app, click where you wish to apply your signature. This will present a list of stored signatures.
Tap your desired signature to place it in the document.
If the signature is not positioned correctly or requires resizing, tap the inserted signature to reveal the resize/move handles and adjust as needed.
When you have finished signing, click the checkmark in the upper left corner of the screen to save the signature as part of the document.
You are now able to share the signed document via email, text message, or another supported file transfer app on the device.