I'm trying to open a PDF file with 7 pages and need to adjust each page in Illustrator CS6. How do I open the PDF file in one single AI files with all artboards within it?
There's this cool plugin: http://aiscripts.com/open-multipage-pdf/
It's worked beautifully for me
The Illustrator PDF Editing Method: Illustrator's open file dialog box allows you to open a specific page of the PDF document. When changes are made to a single page and saved, those changes are saved to the original PDF document overwriting only that page of the multi page PDF file. Aside from a global view of the document as art boards, this works for most cases.
Other Methods: Illustrator doesn't have a way to open a multi page PDF as an .ai file with multiple artboards. One way is with scripts and achieve a conversion or open PDF pages one by one and drag and drop them into a new .ai file presetted with the number of desired artboards.
I forked and translated the original Multi-Page PDF Loader 4 AI v2.5 script to English, and added the ability to import .AI files.
I tested this and can successfully import multi-page documents as artboards.
There is another script that has worked, in some cases better, for me. The interface is in chinese (i think), but is pretty self explanatory. Works in a similar matter to the script mentioned before: