Hello,
as of today: the PDF24 PDF printer creates the pages in the orientation the printing program sends. So first check the page setup or the print dialog of that program.
To change the default of the PDF24 printer itself:
- Open the Windows settings > Bluetooth & devices > Printers & scanners and click the PDF24 printer.
- Open Printing preferences, set the orientation to Portrait and confirm with OK.
This default is used by programs that don't set their own orientation.
To turn the pages of a PDF that was already created in landscape, use Rotate PDF pages in the PDF24 Toolbox. This also works online: https://tools.pdf24.org/en/rotate-pdf-pages