I would suspect the software was written for a non-A4 format, so if you were to put A4 paper in it you might get line wraps that would screw up multi-page prints.
Oh my, I just remembered the pain of setting the perforation skip when using nonstandard paper. And then realizing that those problems were a luxury compared to the problems big professional office printers throw up today.
That satisfying tearing of the perforated tractor feed edges. And the not so satisyfing tear when you tried to do too many at once because you were in a hurry.
Wide format tractor fed music paper in green.
I had tractor fed graph paper for a while. If you want to know frustration, try lining up your DnD game maps to that...
And I had forgotten about the perforation skip/misalignment. Thanks for bringing that back. Triggered.
Oh my, I just remembered the pain of setting the perforation skip when using nonstandard paper. And then realizing that those problems were a luxury compared to the problems big professional office printers throw up today.