Hi @KnowFord and welcome to our community! 
If you want to change the size of the device font, the easiest way is by tapping the Apps-icon > Find and tap "Settings" > Tap "Accessibility" > Tap "Font size". However there is no option in the phone to change the font type.
There may exist apps in Play store that has the possibility to change the font type. Please note though that we cannot guarantee the functionality of apps made by a third party.
I hope that this information was helpful. If there is anything els on your mind regarding your Xperia, feel free to ask!
Yeh tank you but i want to chenge styl font like this image
Thank you @KnowFord for your quick reply!
As i mentioned before, there is no option in the phone to change the font type. So the only way to change the font to the one of your choosing is to search in Play store for an app supporting this function and the font you want.
I wish you the best of luck in your search and if you have any other questions, feel free to ask!
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