Originally posted by gabro822 will the live view focus be affected too by those adjustments or it's independent?
Live View is separate and not affected by the adjustments. So use it as a guide as you tune the phase detect. As noted above it is quite accurate but not as fast.
And please test thoroughly first! Just making changes based on casual observation without controlled testing is likely to make things worse not better! There are many threads here about how to test a lens for AF accuracy. Just do a search of the forums and you will find lots of information on how to test.