Inserting blank pages to large PDF file.
I have a 700 page pdf document of invoices. Some invoices are 2 pages, some 3 and some 4 pages long. I need to insert a blank "This page intentionally left blank" page at the end of each invoice to make them all 5 pages long. Is there an easy way to do this? Maybe with javascript? Really struggling here and any help would be much appreciated.
[Moved out of the non-support, general forum Lounge and into a PDF-specific support forum - moderator]