Print orientation

When arriving at the print dialog for my app running on Linux the ‘Orientation’ option is there but not enabled.
I’m wondering why it’s not possible to set print orientation to landscape for Linux desktop apps.
All other applications that allows printing has this orientataion option enabled.

Anyone?

I have submitted this to the Feedback system, but case has been closed (by design).

See https://forum.xojo.com/2945-landscape-printing