Method of deleting the header: after opening the Word document, click the "View (V)" menu above->; Select "Header and Footer (H)" →; Enter the editing status of header, and the menu of header tools will pop up. After selecting all the contents of the header (press Ctrl+A to select all), click Delete to delete the contents-> After deleting the contents, click Close (c) in the Header and Footer menu.

The method of deleting the footer is still to click "View (V)" menu-> Select "Header and Footer (H)"->; The "Header and Footer" menu bar will pop up-> Click Close (c) to switch the header and footer, and then switch to the footer editing status-> Select all the contents of "Footer" and press "Delete" to delete;

Experience summary: Double-click the header or footer in the document to enter the editing status of the header and footer, and you can edit it again to change the appearance of the header and footer. Delete all the contents in the header and footer in editing state, then operate menu format → style and format, click Clear Format in style and format, and finally click Close in the header and footer toolbar. After you quit editing, the header and footer will be completely deleted.