Merging for advanced users
You want to merge multiple documents, but the cover sheet is part of the file that you actually want to merge as the last document in your complete PDF?
In such cases, it is possible to select documents repeatedly. First, select the document with the cover sheet and define as ‘Page Range’ “Page 1”.
Now select your other files. At the end, add the first document again (the one containing the cover sheet), but this time select the range of pages excluding the cover page (page 2 to page ‘x’).