Adding headers and/or footers to a stylesheet

Question

I would like to push a common header(file name and page number) across multiple notebooks using one Stylesheet.

I know I can use the header/footer dialog on each notebook individually but this is not efficient. A Stylesheet seems like the way to go. I'm comfortable working with Stylesheets and applying them to notebooks.

However, I can't seem to save any changes to my header into a Stylesheet. Is this even possible? If so, how can this be done?

Answer 1

Oh, ok, so it seems that by default PrintingOptions -> "FirstPageHeader" is False ref

So now you can use what I've stated in comments, just add something like:

Cell[StyleData["Notebook", "Printout"],
 PageHeaders -> {{"a1", "a2", "a3"}, {"a1", "a2", "a3"}},
 PageFooters -> {{"a4", "a5", "a6"}, {"a4", "a5", "a6"}},
 PrintingOptions -> {"FirstPageHeader" -> True}
]

in your stylesheet. A minimal example:

CreateDocument[{x + y},
 StyleDefinitions -> Notebook[{
    Cell[StyleData[StyleDefinitions -> "Default.nb"]],
    Cell[StyleData["Notebook", "Printout"],
     PageHeaders -> {{"a1", "a2", "a3"}, {"a1", "a2", "a3"}},
     PageFooters -> {{"a4", "a5", "a6"}, {"a4", "a5", "a6"}},
     PrintingOptions -> {"FirstPageHeader" -> True}
     ]
    }]
 ]