How does the font of Samsung GT-S5830 mobile phone short message become larger? thank you

Font enlargement method of Samsung GT-S5830 SMS:

1. In the phone standby interface, click the application icon.

2. Enter the mobile phone application interface and click the information icon.

3. Enter the mobile phone information interface and click the menu button.

4. In the pop-up menu, click Settings-Display.

5. Check after using the volume key option.

6. When reading the specific information of the short message again, click the volume increase button of the mobile phone to increase the font of the short message.