1.Click the Header or Footer button 
under the Insert tab of the Word Processor navigation ribbon.
2.The cursor will be placed in the Header or Footer area, where you can enter the content you require.
3.While you are in the Header or Footer, you can access additional options under the Header & Footer Tools > Design tab.
For example, if you are creating a document intended for printing, you can specify a unique header or footer for the first page, or have different headers/footers for odd and even pages.
4.When you are done editing the Header or Footer, click the Close Header and Footer button.
