Where is the font size set by SMS?

In the SMS content interface, directly slide the screen from the inside out with two fingers to enlarge the font, and slide the screen from the outside in to reduce the font.

You can adjust the system font to meet the requirements, as follows:

Find "Settings" in the main interface of the mobile phone, and click Enter.

Then select common settings.

On the General Settings page, select a font and click Enter.

Select "font size" on the font page and click Enter.

Then you can choose the font size, as shown in the figure:

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