Word how to add line in header

- Word how to add line under header
- How to add line in header microsoft word
- How to add line in header and footer in word
- Microsoft word how to add line under header
- How to add horizontal line in word header
- How to add line after header in word
- How to add a line under header in word 2016
- How to add border line to header in word
- How to add lines in word