How to turn on double-sided printing option when it is grayed out?
I have an Epson 3760 printer with a double-sided printing option. I have an iMac 27 inch; late 2013; 3.5 GHz Quad Intel Core i7 running Catalina vs 10.15.7.
I previously had the ability to print double sided. I can print double sided from my iPhone. I printed a multi-page document from MS Word yesterday and unchecked the double-sided printing. Today, that double-sided option check box has disappeared.
Why is my double sided option grayed out? How do I turn it back on?
iMac 27″, 10.15