How can I change the amount of pages stored on a PDF file?

When scanning pages to a PDF file it only allows 100 pages. Anything over 100 pages creates more than one file.How can I change the amount of pages stored on a PDF file?
You can use a PDF merger to combine multiple PDF files.

http://www.anypdftools.com/pdf-merger.ht

Or you can split a large PDF into smaller one. It can even remove pages from PDF files.

http://www.anypdftools.com/pdf-splitter.

You can have a try.

Hope it helps.How can I change the amount of pages stored on a PDF file?
There are some professional software like Adobe Acrobat to edit PDFs directly but their prices are extremely high and operating are so complicated. Why not use a pdf editor to reduce your pdf files size by spliting and merging them.http://www.allpdftools.com/pdf-editor.ht

By the way,you can also convert it to editable word format with Adreamsoft PDF to Word Converter and make some edit on content if necessary. It works for me and perform well. http://www.allpdftools.com/pdf-to-word-c

After you edit them, you can use a office add-on SaveAsPDF to save word as pdf format.http://www.microsoft.com/downloads/detai

You all can have a free trial and sincerely hope they can do you some favor.
Try A-PDF Image to PDF it can scan paper to Acrobat PDF documents and allows over 100 pages.