How I can duplicate documents from the Adobe Acrobat app for iPhone?
Do you mean that you want to (a) duplicate one document at a time in Acrobat Reader for iOS or (b) make backup copies of the documents and transfer to a Windows or Mac desktop computer?
For (a), How to manage files in Adobe Acrobat DC for iOS
For (b), How to backup and restore PDF documents on iPad/iPhone using iTunes
Please let us know if you have additional questions.
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