1. First click the "Start" icon in the lower left corner of the computer desktop.

2. Then in this interface, click the "Control Panel" option.

3. Then in this interface, click the "Appearance and Personalization" option.

4. Then, in this interface, click the option of "Enlarge or reduce items such as text".

5. In this interface, click the "Set Custom Text Size" option on the left.

6. Secondly, in this interface, modify "Text Size Percentage".

7. In this interface, click OK.

8. Finally, in this interface, click the Apply button.