Font embedding problem

Hey peeps!

So I have these input-text boxes which has a maximum character of 3 and embedded only with Numerals but you can still type most kinds of letters which ain’t numbers, why?

Well I don’t know, that’s why I ask :smiley:

I have added a downloaded font inside the library which the boxes is using but i can’t get rid of the letters unless I change font!

Help would be appreciated!

Thanks in advance!