New Manuscript Pages can be created on Special:NewManuscript.
Manuscript Pages can contain any content, from any author, as long as the format is either .jpg or .jpeg. At this moment, the name of a manuscript page can only contain letters or digits.
Manuscript Pages can also be added to a collection. A collection is simply a way for the user to specify that different manuscript pages belong together, because the pages are, for example, part of the same book.