Installed cups-pdf on a Mint OS.

Users are running report programs that auto print to the printer defined in the environment variable PRINTER. For PDF files this is set to a printer named and defined in CUPS as PDFPRINTER. Printing is not performed using the lp command.

Cups-pdf works great but I would like default printing to be in landscape mode.
I suspect this can be done by making changes to /etc/cups/ppf/PDFPRINTER.ppd

In this file there is an entry
LandscapeOrientation: Plus90

Finding the possible options for this entry is not easy to find.
Does anyone know where the options might be found and/or
whether this is the correct line to change in order to get landscape output and if not what line should be changed.

Specific options can be configured by creating a printer instance.

https://www.cups.org/doc/options.html

All of these options require the use of the lp command.
The software in use send to cups-pdf from the application to which there is no access.
It is not an option to use the lp command.
I need to set the default behavior of the printer (in this case cup-pdf) to print landscape.
This should be possible using one of the cup configuration files in /etc/cups

An instance is a copy of the printer with specific options. You change the environment printer variable to the instance. No need to use the lp command.

Yes thats how it works. the environment variable is set to the name of one of the cups printers. In this case cups-pdf. lp is not used. If it were we could set the option to belanscape but using lp is not an option because of the ay the system is set up.

The problem is to tell cups to default to a landscape presentation for that printer. Cn I do that in the ppd config file or somewhere else?

I have not found another method yet.

To create an instance with landscape as default and set the default printer to that instance.