Hello, and welcome to the HP Community @annsie32,
I understand you are trying to set the default print setting s on your HP Officejet Pro 8600 Plus. I will be happy to help.
Below, I have posted a link to a document that offers some troubleshooting solutions to this issue. When you open the document, please open the drop down titled "Change print settings from the Windows 8 Desktop", then scroll to the section titled "Change the default print settings for all print jobs". Please try out all of the steps, in order and get back to me with the results.
If this helps show appreciation for my reply by hitting the “thumbs up” below, or click the "Accept as Solution" button if I have helped you reach a solution.
I hope this helps, and have a great day.
MarcelusWallace
I work on behalf of HP
★Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
★Click the "Kudos, Thumbs Up" on the right to say "Thanks" for helping!