Anyway to increase the font size of SMS messaging app in moto e

[rvsw]

I have beginning to develop an eye problem and therefore need the font size of SMS messaging app to be increased. For example, the window where the SMS is composed can be possibly resized so it occupies more real estate on the screen as compared to the window that lists the messages from a particular sender. Currently, when I start composing a message the window that lists the message occupies more than 80% of the space while the vendor that composes the message is the rest. If there was a way to resize, perhaps I can increase the font size and also read more of the message that I'm composing.

The phone that I use has got one GB RAM and has got limited space for installing new application therefore I cannot install any SMS application and have to contend with the default messaging app

Any help will be appreciated