From the Home screen, tap the Apps icon (in the QuickTap bar) > the Apps tab (if necessary) > Tools folder > File Manager .
Source : https://www.lg.com/us/mobile-phones/VS985/Userguide/402.html
Ctrl+W: Its use is to close the currently open document or a file quickly.
Source : https://www.javatpoint.com/computer-shortcut-keys
Acrobat Reader is a free, stand-alone application that you can use to open, view, sign, print, annotate, search, and share PDF files.
Source : https://www.adobe.com/acrobat/pdf-reader.html
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Source : https://www.youtube.com/watch?v=gMYvCEFmZvM
To make sure you're protected by the latest security updates, Google Chrome can automatically update when a new version of the browser is available on your device. With these updates, you might sometimes notice that your browser looks different.
Source : https://support.google.com/chrome/answer/95414?hl=en&co=GENIE.Platform%3DAndroid
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Source : https://www.youtube.com/watch?v=r3dl2QvDluk