Tools/raw materials: Word 2007, win7 x64.

1. Step 1: Open the document to be modified, then press the shortcut key "Ctrl+H" to open the search box, click "Search" and then click "More", as shown below.

2. Step 2: Select "Special Format", as shown below.

3. Step 3: Click any number again, as shown in the figure below.

Step 4: Click "Main Document" at the bottom again, as shown in the following figure.

Step 5: Then close the window, and you will see that the numbers in the document will be automatically selected, as shown in the figure below.

6. Step 6: Then we can set the font and font size in the font, as shown in the figure below.