Before you can insert chapter information into a header or footer, you must first set the chapter numbering options for the paragraph style that you want to use for chapter titles.
Choose Tools - Chapter Numbering.
In the Style box, select the paragraph style that you want to use for chapter titles, for example, "Heading 1".
Select the numbering scheme for the chapter titles in the Number box, for example, "1,2,3...".
Type "Chapter" followed by a space in the Before box.
Enter a space in the After box.
Click OK.
Apply the paragraph style that you defined for chapter titles to the chapter headings in your document.
Choose Insert - Header and Footer - Header or Insert - Header and Footer - Footer, and then select the page style for the current page from the sub-menu.
Click in the header or footer.
Choose Insert - Field - More Fields and click the Document tab.
Click "Chapter" in the Type list and "Chapter number and name" in the Format list.
Click Insert and then click Close.
The header on every page that uses the current page style automatically displays the chapter name and number.