Hi,
What I am saying is that many times, perhaps not in your instance, you can set up a header and footer that work equally well in a portrait or landscape orientation, unless you have different information in the headers and footers depending on the orientation.
Headers and footers are Section (not page) components. Sections / Headers and Footers in Microsoft Word 2007-2013. It appears you understand this but I am uncertain when you talk about inserting a page with appropriate headers/footers.
You can include information from a page in a header/footer displayed with that page using the
StyleRef Field.
AutoText is a type of quickpart.
You can create multiple header/footer quickparts and store them in your document template. You could have a macro in the template that selects a particular quickpart.
You can have a custom set of QAT buttons attached to the template that call on various (informatively-named) macros.
You cannot have a gallery that includes an entire page with headers/footers. You can have a gallery that has page text. You can include an associated header in the header gallery for your template. You can include an associated footer in the footer gallery
for your template. You could have macros that start a new section with a new page and insert all three in the appropriate locations.
You could customize the ribbon for your template to have custom buttons on the ribbon with help text in screen tips.
Customize the Ribbon (It doesn't take rocket science)
Before you go overboard, though, I would strongly recommend taking another look at the
alignment tabs and StyleRef fields. Again, the alignment tabs align to the page margins, not to the horizontal distance across the page. Generally, the page margins on portrait and landscape pages give good markers for where you want your header/footer
elements.
The picture below shows traditional center and right tabs set for a portrait layout in a page set for landscape display. Immediately below are corresponding alignment tabs (center and right) on the same page. In the portrait orientation, the tabs are at the
same position but when the orientation is switched, the alignment tabs set to the new orientation automatically. This is in a page with 1" margins all around.
