The order in which files in a PDF Portfolio are displayed is set in this way: From the Modify menu at the top of the portfolio, choose Edit Portfolio. In the Edit Portfolio panel on the right, select SPECIFY FILE DETAILS. You can select the sort order of the files from this list: Name, Description, Modified, Size, Compressed Size, or Creation. You could insert a number 01, 02, etc. either before the file name, or in the Description field, which specifies the way you want the files ordered.
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