1. Open the WORD document to be operated, and click the "References" tab in the toolbar above.
2. Stop the cursor where you need to add a reference mark, find the footnote option, and click "Insert Footnote".
3. You can find that the corresponding serial number is automatically added to the position, and at the same time, the cursor jumps to the end of the page, and relevant references can be entered after the serial number.
4. Return to the main document and find that the annotation operation of adding references in WORD has been completed.
The above operation is also applicable to the Word software in the Office suite on the computer, and I hope it will help you. If you have any other questions, please feel free to ask.