How does Samsung mobile phone adjust the font size of SMS?

The method for adjusting the font size of SMS is as follows: Method 1: Adjust the font size through the side volume key and left key Note: Some models may need to set it in advance (Information-Menu-Settings-Use the volume key to change the text size. Method 2: Two fingers stretch, two fingers stretch outward to enlarge the font, and two fingers draw inward to reduce the font.