How to Change Settings to Open a PDF File. A Portable Document File is a type of file that uses an open standard across different computer platforms and programs.

However, if you do not want to do that, you can always open PDF files in Protected View in Word. It helps you block any macros from running right after opening the file in Word.

If you keep Chrome up-to-date without changing any settings, any PDF you download may open within the web browser by default.

Press "Alt-F2" to open a command line prompt within Unity. Type the command for Evince with your PDF file's name, file extension and its full path relative to the Home directory.