How to open Google PDF Viewer app? I can't find Google PDF Viewer app icon even though I have installed it from Google Play Store. How can I open it?

Also, I'm unable to close display green light on top of display screen.
Google PDF Viewer doesn't have app icon.

However, when you're trying to open a PDF file from other apps (e.g. Download, or any file manager like ES File Explorer), it will be listed as one of possible app inside App Chooser dialog.