I am running version 184.108.40.206 on Windows 10. When using File/Print, the properties button does not pull up the expected dialog with options for my Brother MFC-2740DW, specifically an option for duplex printing. There is a rather generic tree that doesn’t have a duplex option available, as the program doesn’t seem to sense my printer.
I have looked at the answers relating to duplex printing and have found nothing that helps/applies. Under the Options tab, I have checked “Use only paper tray from printer preferences” and “Use only paper size from printer preferences”, as advised in one of the answers, which didn’t help.
I have written windows programs in the past, and this is something that every program that prints under windows should provide.