Here is a list of steps you can take to change your computer’s default PDF reader:

1. Locate the default PDF viewer – Find the program your computer uses to open PDF files.
2. Download a new PDF viewer – Look for a program that has the features you want and that will fulfill your PDF viewing needs.
3. Install the new PDF viewer – Follow the instructions for the program you downloaded to get it installed on your computer.
4. Set your default PDF viewer – Depending on your operating system, go to the settings menu to locate and select your preferred PDF viewer.
5. Test your new PDF viewer – Open a PDF document to ensure that the new program is the one being used.