How does a salon highlight your hair?

Like, what do they do exactly?How does a salon highlight your hair?
when i had it done


they rushed my hair backwards and got a big section from the middle


split it up into thin layers


and then used the esharp pointy end of a comb to get it into little section


then they slopped the die on it and wrapped it up in tinfoil











but they can also put a cap on your head that has holes alal over it


and then using a needley thing they pull out strands of hair


and then they slop the dye on it





hope this helps xHow does a salon highlight your hair?
With special head paint.