Method: quickest - word 2010 headers and footer problems for various sheet sizes

Scenario: Imagine a document in word 2010 contains a mix of a3, a4 portrait and landscape.

This can lead to heading and footers inconstancies between different pages.


Question 1: What is best method to avoid this in step by step order including shortcut keys and why?


Question 2 : What is best method to deal with problems when its already to to late where some header and incosistancies exist and now you trying to fix.


Question 3: Is there any standard VBA code that can dod this all for you regardless of document.