Send a PDF document to a third party appTo send a PDF document to another app, just follow the steps below:Open the PDF document you want to open in another App.Open the Share Menu as indicated in the screenshot below. Tap on Share. Choose the App you want to open your PDF document with. If your App is not listed, Tap on More. Open the PDF document you want to open in another App.Open the Share Menu as indicated in the screenshot below. Tap on Share. Choose the App you want to open your PDF document with. If your App is not listed, Tap on More.