Brett on 26 Jul, 2017 02:59 PM
Unfortunately this isn't the way per-document settings work. "Document"
refers to the entire document, with all included files concatenated.
Because rendering requires documents to be combined first, individual
includes cannot contain metadata (or at least it won't be registered).
Furthering the issue, at the time of printing (including paginated PDF
export) the document is already converted (with metadata removed) and
pagination is determined by the print system, so Marked can't know where
to change the headers.