Dorico 6 can't print single sided with HP printers

[asherber]

Are you on a Mac? Maybe this will help.

Print one sided

The fix is to make sure that your printer’s built-in default is to print single-sided, and then set duplex in Print menus when you need it. You may need to do this via your printer’s control panel, if it has one, or a web front-end interface. You can usually access this from System Settings > Printers.