Why reorder pages
Scanning stacks of paper, merging files and photographing documents often puts pages in the wrong order. A document with pages out of order confuses readers and can be rejected by offices. Organize PDF lets you set the order once and save a correct copy.
How the two modes work
With Custom order, type the new order of pages separated by commas, using ranges where helpful — for example 3, 1, 2, 4-10. With “Reverse all pages”, the whole document is flipped from last to first, which fixes stacks scanned face-down. Pages are copied without any change in quality or text.
Planning a new order
Write the current page numbers on a piece of paper next to what each page contains, then write the order you want. Typing ranges such as 4-10 saves time for pages that are already in the right sequence.
Common problems and how to fix them
A page is missing in the result: every page you want to keep must appear in your order list. A page appears twice: you typed its number twice — that is allowed, so remove the extra number if it was a mistake. The order is still wrong after scanning double-sided: use Keep Odd Pages and Keep Even Pages, then merge them.
Good habits
Check the first and last pages of the result, keep the original file, and reorder before adding page numbers.