Help How to change font size of messages?

[PrinceOfDorne]

I already changed the font size on the display settings but it doesn't affect the font size of the messages.

 

[A bochur]

On an s5 while viewing messages, i was able to press on the volume up button, and that made the font bigger. Pinching to zoom did the same. Not sure if it's the same in your phone

^I'm talking about the messaging app. If you meant something else, please clarify.