Footnotes by default are using Arabic numerals from 0 to 9. However, you can change from numbers to letters or any other numbering styles. Please check the steps below to change the footnotes numbering:
Step 1: Click anywhere in the word document;
Step 2: Click the "References" tab from the ribbon;
Step 3: Click the right-bottom corner in the "Footnotes" section;
Step 4: In the new window, check "Footnotes" and select a numbering style from the "Number format" box;
Step 5: Click "Apply" at the bottom to finish.
