Hello, the setting method of mobile phone font size is different for different mobile phones, but most of them are similar. Take Xiaomi mobile phone as an example to introduce the method of adjusting the font size of mobile phone, as follows: 1. Open the phone settings, slide down to find the display options, click Display, slide down to find the font settings, click Enter, and then adjust the font size as needed. We can use the software "Adjust system font size" (download address:) to set the font globally. Run the program on the phone and drag the interface directly ... In the past, Android phones needed to modify the system Root first, and then modify the build.prop file, which was very troublesome. The biggest feature of this software is that it doesn't need Root, and modifying fonts won't affect the display of theme application icons.