Thank you very much for your reply. The support document you linked makes two references to popup menus
Presets pop-up menu
You can save a group of print settings as a preset, then choose the preset from the pop-up menu to use the settings again for other print jobs.
Print options pop-up menu
Choose settings for paper handling, page layout, media type, and more. The options in this pop-up menu, and the ones below it, change depending on your printer and the app you’re using.
Where do these appear? The only popup menu in the Printer dialog is this one
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Within the dialog I can uncheck two-sided, but I have to do that every time I access the print dialog in every application. Perhaps if I could find the two popups referred to I might have more success.
Thank you again.