I have tried different printers, different windows environments. I have changed the defaults on the printers to only print in landscape, invoice still prints in portrait. If I print to a PDF, it works fine.
The default layouts are made specifically for either A4 or Letter portrait format. You need to change the base layout in order for it to print (correctly) in landscape format.
Are you using RDLC or Word layouts?
we are using RDLC
Ok, then unless you're familiar with RDLC report design, then I'll suggest that you contact a NAV developer to help you.