How to Change Default PDF Viewer in WhatsApp Once you clear the defaults for the new PDF reader, you will be asked to set a default app when you open any PDF file.

But if the option is missing, tap on Open by default followed by Clear defaults. Step 3: Tap on Clear defaults, if available on your phone. Step 2: Tap on the app that is opening your PDF file. Step 1: Go to Settings of your phone and tap on Apps & notifications/Installed Apps/App Manager depending on the option available on your phone. If you don’t see the App info button, here’s another way to change the PDF app. Hit Advanced followed by Open by default. Step 2: You will be taken to the App info screen. Then tap and hold the app icon that is launching your PDF files. Now that you know the guilty app, it’s time to slash its powers for opening the PDF files. Notice the name of the app opening your PDF file. Once it launches in the new PDF viewer, tap the Recent apps key on your phone to view all the open apps. Find the Culprit Appįor that, open any PDF file. When you do so, you will be asked again to choose a default app. Then you have to remove it as your default PDF viewer app. To change the default PDF viewer, first, you need to identify the app that has hijacked your PDF files. View PDF Files in Different PDF Viewer App You just have to change the default PDF viewer on your phone. What does one do in such situations? The solution is easy. The worst thing, some files were not opening at all. Instead of launching in her preferred PDF viewer app, now the PDF files were opening in a different app. The same happened with a friend of mine a few days back with the PDF files.

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