Repeat for each chapter or section in the document
Now, Microsoft Word will know where each chapter starts and ends. As such, you can apply distinct chapter headers to each section. All you need to do is:
Open the header anywhere in the first chapter (as above)
Go to References > Captions > Cross-reference
Select ‘Heading’ under ‘Reference type’ in the new window
Pick the required heading from the list and click ‘Insert’
This will add a header throughout the section selected. If you repeat this for each chapter, you’ll have a nicely formatted document at the end of it. Just remember that these headers don’t update automatically. As such, if you change a heading, you’ll need to update the header, too.