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When using Save as PDF function in Opera, page url is not stored anywhere within the generated PDF document. Printing puts it in the footer, but result is not as nice as single-page layout that Save as PDF offers. Can url be put into Title or Subject fields of PDF's metadata?
PageTitle - PageURL in Title sounds good. If page URL is stored in a custom field, different PDF readers might not display that field anywhere. While Subject field is not used as often, it is a part of the PDF specification (Document Information Dictionary) and its use does not fall far from the tree if we say that the subject of the document is the URL from which PDF is saved from. 
As for the Chromium's PDF viewer UI in general, instead of just handling one specific field, it would be better to display all properties from PDF's Document Information Dictionary. This way it doesn't matter if the URL is in a custom or a standard field.
PageTitle - PageURL in Title sounds good. If page URL is stored in a custom field, different PDF readers might not display that field anywhere. While Subject field is not used as often, it is a part of the PDF specification (Document Information Dictionary) and its use does not fall far from the tree if we say that the subject of the document is the URL from which PDF is saved from.
As for the Chromium's PDF viewer UI in general, instead of just handling one specific field, it would be better to display all properties from PDF's Document Information Dictionary. This way it doesn't matter if the URL is in a custom or a standard field.
When using Save as PDF function in Opera, page url is not stored anywhere within the generated PDF document. Printing puts it in the footer, but result is not as nice as single-page layout that Save as PDF offers. Can url be put into Title or Subject fields of PDF's metadata?
@leocg Should I post this under suggestions and feature requests?
When using this option, original url is not stored within the generated PDF. Is that also a bug or something that never worked?
It would be great if the url is stored in the Title or Subject field of PDF's metadata.