1. Place the insertion point in the part where the footnote format needs to be changed. If there is no section, you can place the insertion point anywhere in the document.

2. Execute insert, quote and footnote to open the footnote and endnote dialog box.

3. Click to select the footnote option.

4. In the number format box, select the desired format type. If the document is divided into multiple parts, selecting "This Part" in the "Apply Changes to" drop-down box will only change the footnote format of this part, and selecting "Whole Document" will change the footnote format of the full text.