Final answer:
To add text to the center header in Excel, use the Header & Footer tool.
Step-by-step explanation:
To add text to the center header in Excel, you can use the <strong>Header & Footer</strong> tool. First, go to the <strong>Insert</strong> tab and click on <strong>Header & Footer</strong>. Then, choose the <strong>Center Header</strong> option and type in the desired text. Finally, click outside the header area to save the changes. If you encounter any errors or have difficulties modifying the header, double-check your Excel formatting.