1. First, in the open word homepage, click Insert-Header in the menu bar to select the built-in template from the pop-up options.

2. Double-click the header to enter the editing state, and there is a line in the header. Click the Clear Format tool to clear it.

3. Footer insertion is similar to header operation. Click Insert-Footer, or you can choose a built-in template.

4. If you need to edit the footer, follow step 2 and double-click the footer to edit it, as shown in the figure below.

5. After the header and footer enter the editing state, you can edit the header and footer format in the menu, as shown in the figure below.