In a new profile I defined a custom paper size here:
Document » Document Properties 2 » Use custom paper size
I save the profile and reopen it, navigate to Document » Document Properties 2 and it looks like:
x Use fixed paper size
x Use custom paper size
» The settings are greyed out, which is confusing. Are the settings used - and if yes, why are they disabled?
» It is particularly confusing, because PDFCreator uses the Size "a4", and not the custom paper size.