Help describe style to hairdresser?

However, I've noticed that when my hairdresser cuts the layers, she first makes a part in the middle of my hair and makes layers from that. The result is that there are a lot more layers on my right side than my left side.

My question is - is there a way to make it so that I have even layers on each side of my side part? Would the hairdresser make layers using a side part while working instead of a center part? Is this something that works?

I feel nervous asking the hairdresser to do something that I don't know is even a thing in hairdressing since this is not an area I have much experience in.

Thanks!