If you use default macro's in header and footer page-numbers will appear in multi-page scores.
Pagenumber macro's may be used:
|<$N>||number of pages|
|<$1>||skip anything behind it on odd-numbered pages|
|<$2>||skip anything behind it on even-numbered pages|
|<$>>||skip anything behind it on first page|
|<$<>||skip anything behind it if there is only one page|
Using the macro's $> (skip rest of line at even pages) and $< (skip rest of line at odd pages) in combination with $# it is possible to get the page numbers at the outer side of a page, useful when creating a booklet.