A family of Microsoft word processing software products for creating web, email, and print documents.
Stefan mentioned changing the style, not using find and replace.
- In Word, choose Home>Styles Pane.
- Set the List dropdown to All Styles.
- Scroll down to Footnote Reference, then hover your mouse of the bar with the style name.
- Click on the down-pointing arrowhead at the right end of the bar and choose Modify Style.
- In the Modify Style dialog, click on Format>Font.
- Set the Superscript option to be checked. OK out.