Step 1: Double-click a formula on the paper to open mathtype, and click Size-& gt；; Define Opens the Define Dimensions dialog box.

Step 2: Set the pt value corresponding to all font sizes to "complete", and the pt value corresponding to small font size 4 is 12. Click "OK".

Step 3 click preset->; Formula preset->; Save to a file and set this change as the default profile.

Step 4 Click the MathType tab on the Word2007 interface-> To format the formula, in the pop-up Format Equation dialog box, select MathType Preferrence File, click Browse button, find the configuration file you just saved, select the option of Whole Document, and finally click OK.

The above is how to modify the MathType mathematical formula in the paper into a small four font. To learn more about the use of MathType, you can download the tutorial address in MathType materials to see more skills in using MathType.