A document can be turned into a single scroll, or multiple pages
can merged into a single long page, by selecting the desired pages in
Page List, bringing up the contextual menu and selecting
Merge Selected Pages.
The resulting new page consists of a blank page, tall or wide enough to fit all of the merged pages, which are stacked on top of or next to each other as static annotation objects, allowing for further tweaking if desired. The merged pages are removed as individual pages in the document. When saving the document the merged pages are burned into the new page, effectively becoming one unit.