Size of letters on the screen

Hello, I just downloaded dofus touch and the only problem that I have is that the letters are a little too small, and I have trouble reading them, I searched for an option to make it bigger but I couldnt find it, I play on a cellphone samsung J4, I know its best to play on a tablet, but it will be cool it there was an option to make letters bigger. Thank you very much <3

~We only know if we try