If you want to split a pdf into separate pages under General Ledger/Physical Vouchers (inbox) then you can either:
1) use the 'Split pdf into several pdfs' button and mark the top voucher with a mouse click and then scroll down and click shift+mouse click on the last page. The voucher will now be split into one page per voucher/line in the inbox.
2) check the 'Split pdf into several pdfs' button when using the 'Add' button to add the voucher (instead of the scan email or drag and drop function). The pdf will hereby automatically be split into several pdfs with one page per pdf/line in the inbox.
Read more here (use google chrome to translte).