How to add headers and footers to a document in Google Docs?

To add headers and footers to a document in Google Docs, you can follow these steps:

1. Open your document in Google Docs.
2. Click on the "Insert" tab in the menu.
3. From the drop-down menu, click on "Header & page number."
4. Another drop-down menu will appear with different options for headers and footers. Choose whether you want a header or footer, and then select the style you prefer.
5. Once you've selected your desired style, the header or footer will appear on the top or bottom of the page, respectively.
6. You can now customize the content of the header or footer by clicking on it and editing the text.
7. To further customize headers and footers, you can go to the "Insert" tab again and use options like "Page numbers" or "Insert date & time."

You can repeat these steps on every page of your document where you want the header or footer to appear. Note that a header will appear on every page except the first page by default, but you can choose to display it on the first page as well if needed. Additionally, footers will appear on every page by default.