How to set height of viewport manually

ok so, still the issue that there is no answer on C++ section where the source code for viewport is
im not a C++ developer, im not even interested.

theres a thing in the editor config called “mouse scroll camera speed”
then it literally forces you to use whole numbers ?

what in the **** is this ? theres only one way to walk through height levels and it limits you
and im trying to get rid of that limit so i can set a freakin height that isnt stupid