how to customize them?

Hi Celine

Thank you for your question

If you click on the view menu and select headers and footers you can then customise them in a number of ways.

First you can insert text, page number etc. by using the header and footer toolbar

You can insert pictures (e.g. Logos) by clicking on Insert-Picture-From file.

You can also go into File-Page set up and choose to have the header on the frontpage different from all the other headers

Hope this helps

Regards

Stephen