How to sign a PDF DocumentIf you want to sign a PDF document, just follow the steps below.Open the document you want to sign.Tap on the Tool Bar button Tap and hold on the Text button. Select Signature. Sign and confirm with Done. Move your Signature to the right spot. Open the document you want to sign.Tap on the Tool Bar button. Tap and hold on the Text button Select Signature. Sign and confirm with Done. Move your Signature to the right spot.