Stacks Over 20 Pages 
Doxie Pro's ADF scans 20 pages at a time. If you have more than this for a stack and you want to create as one multi-page file, Doxie's software can handle turning large documents into a single file.
So, If your document has more pages than the capacity of the feeder, scan multiple batches, then staple the batches together in Doxie's software to create a single stack. When you save as a PDF file, you'll end up with one big PDF file.