When printing from AlphaCAM the paper size and orientation is always defined by the default printer driver. If you are printing to another printer which is not the default, you must adjust the paper settings.
When printing from AlphaCAM the orientation of the page is controlled from printer properties. If it seems that portrait is the only option and landscape cannot be selected, check the paper setting.
Some paper settings (eg. letter) may not allow you to set Landscape. If you select A3/A4 as the paper setting the orientation option will become available.
