When each chapter needs its own header
Books and long reports often need the header to reflect whichever chapter or section the reader is currently in. Section breaks combined with unlinking "Link to Previous" let you apply a fresh header starting from any page you choose, without disturbing what comes before it.
A common trap to avoid
The single most common mistake is editing a header without first turning off the link β since the sections stay connected by default, any change you make will silently overwrite the header in the previous section too. Always unlink first, confirm the previous section's header is untouched, then type your new content.
Frequently Asked Questions
What happens if I don't turn off "Link to Previous"?
Any edit you make while the link is still active will change the header in the earlier section as well, since the two remain connected β so always unlink before editing.
How many sections can a document be split into?
There's no meaningful limit β you can divide a document into as many sections as you need, so even a document with many chapters can give each one its own distinct header.