Applies to : QuarkXPress 2019, QuarkXPress 2020
So to import the PDF output styles from version 2019 into 2020 please perform the following steps:
To transfer the PDF export presets to the new version, navigate as follows:
Open QXP 2019 >> Edit >> Output Styles >> Export
You can save the PDF export presets as an .xml file. Then navigate in QuarkXPress 2020 in the same way and click on "Import" to transfer the file saved as .xml to QXP 2020.