I want to view a PDF document that contains images only. Displaying them in m by n is very convenient to compare one with the others. Shortly speaking, how to display m by n pages in Adobe Reader 10?
It appears that in Adobe Reader and many other PDF viewers the best you can get is 2 by N pages. In Adobe Reader set Page Display as Two Page Scrolling.
Possible workaround: Printing to PDF file Multiple pages per sheet.
In Adobe Reader go to Print, in Page Handling set Page Scaling to Multiple pages per sheet and set desired m by n pages per sheet.
Many PDF printing tools are listed in How to print documents to pdf.