If the invoice has come out to the Worklist, you will need to send it bak to Document Import.
1) Double click the invoice in the list to open it.
2) Hold the cursor over the icon near the upper left-hand cornder, that is a downwards arrow with a little tick on it, until you see the other choices
3) Choose "Back to Import".
5) Open Document Import where you will find the invoice. Its filename will be "Rescan + archive number".
6) Double click on that line to open it - you will see the other pages from it below.
7) select the page you wan to remove and then click the trash can just above the images (important*) to remove it, or the split icon if you want to make that page into its own invoice.
(* Don't use the trash can ikon to the right of the screen as that will take the whole invoice out of the workflow).
8) Send the invoice back tothe Worklist.