Font size is too small

[pedramtt]

A great aplication but no possibility to change the font size

I have installed it on galaxy s5 s4 huawei g7 galaxy ace 2

and no difference

about 2 years I say to myself there should be a hiden trick to change the font size
and I cant find it

[pedramtt]

and also a Black background with a creamy font colour will be great
that not burning our eyes in the night

but first the font size should be bigger