Page format missing


I used pdfcreator for long time. On new computer (office 2019), there are many paper format missing. For example, letter and tabloid (11x17) are not available in the list. On other printers of the computer the paper format are all there.

Is there a way to add the paper format missing? How the paper format list is created at installation? This could help understand why some paper format are missing.

Thanks you

Ok I found. I had to go in the print manager ( Gestion de l'impression). There i can add my own file format, and they appear in pdfcreator.