Hello Wyson Jonathan
Thank you for your contribution to the Microsoft Community.
I understand that you want to print the drop down list as a PDF.
You can try setting the area as the print area.
Set or clear a print area on a worksheet - Microsoft Support
Or you can try to use the screenshot as a picture directly.
Insert a screenshot or screen clipping - Microsoft Support
If there is a mistake in my understanding, please describe it in more detail. Looking forward to your further reply so that we can serve you better.
Best wishes,
Rel - MSFT | Microsoft Community Support Specialist