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I was wondering whether anyone knew the proper PDF metadata key (and value) in order to signify to PDF readers that the PDF in facing mode should be displayed from right-to-left (RTL) and not left-to-right. I use many Arabic PDFs (mainly scanned, not typed) and apparently no one encodes them properly (or whatever software they are using does not support the feature). I would like to edit the metadata so I can view pages in facing mode properly.

(I assume somebody who creates PDFs of Japanese manga, as well as Hebrew etc. documents would know this. I was unable to find a real PDF specification regarding this.)

Thank you

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Perhaps this will help. –  Karan Feb 8 '13 at 0:03
    
@Karan Thanks a lot! From that link this method did work: "File menu : Properties : Advanced : Reading options : Binding : Right Edge This will revert page order." I tried it on a friend's copy of Acrobat (don't have one myself). I'm looking into preferably free methods though. If I could find a metadata editor (CLI or GUI) that allows me to edit the Root object it would be perfect. See link for the info the dev of Sumatra PDF provided. So far I did find BeCyPDFMetaEdit (GUI) which does not seem to allow that, and ditto with pdftk (CLI). –  Imran Feb 20 '13 at 19:15
    
There are lots more PDF metadata editors available, such as this, this, this and so on. I'm sure at least one of them will allow you to specify RTL order. –  Karan Feb 20 '13 at 20:40

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