If possible, set your configuration to one of the presets. When you make additional adjustments, change one setting at a time and print a test label to see the effect of each adjustment.
Orientation can be defined in several places. Adjust and test the settings in the following order:
Check and change the default orientation of the page in your printer settings and try printing again. For large address labels, set the orientation to Landscape.
Adjust the printer settings in the operating system’s settings/control panel.
Change the orientation of the document in the browser's printing dialogue or in Provet ProPrint (macOS) settings (if one-click printing is in use).
Adjust the rotation in the PDF label printer settings in Provet (in Settings > General > Integrations > Label printing).