Where is the viewport C++ code?

im getting really tired of how bad some of the controls are in Unreal Engine

if there’s a quick and easy way to get at the source code:
(its c++ so this means, no memory management, no ridiculous variable names repetitively)

  1. the whole panel at the top right that isnt updated for 4K for control of slide rotate etc then all the editor settings
  2. the part where they keep reusing the same slider, when the slider has no practical value to it whatsoever as is

thats all i can think of right now , i dont want to mess with that side if i dont have to
i can code in anything if i can see whats involved in front of me on 1 screen at 1 time

i have a feeling the 2 specific parts i need are going to be litered in a 500,000 line file
that if u compressed it would be 4Kb because of all of the repetiion of → and things like that

oh i thought of the other one - i need access to all the viewport movement controls
that tie it to the mouse - somewhere they’re using an unmutable number? i guess is the term

and i really need my mouse to fly over my stuff like its a precision glider, not like some erratic geriatric coder who spent too many hours in front of 24" crts in the 80s

thats supposed to be funny btw its supposed to be a laugh sigh