(1) First, open the document and execute the edit/replace command. In the Replace tab of the Find and Replace dialog box, press the Advanced command button and place the insertion point (cursor) in the Find What text box. Click the special character command button and select any number in the list box that appears. At this point, all the numbers in the text can be set to red, bold and oblique.

(2) Similarly, delete the original characters in the Find Content text box, place the insertion point (cursor) in the Find Content text box, select "any letter" in the "Special Characters" list box, and click the "Replace All" command button to meet the setting requirements of all letters in the text.