"It allows me to modify the sound but I don't know what setting to adjust it to."
Can't you just experiment, you can't break anything, unless you have the volume too high and blow the speakers?!. It's difficult for someone else to instruct you - remotely - how to set up your TV either sound of vision. It's all a matter of personal taste.
Here's a point of fact, everytime I used to visit my inlaws the colour of their TV was always set so everyone on screen looked 'bright red'. So I would adjust it to what I perceived to be considered real colour. But next time I went it had always been reset back to the way it was. After a few goes, I got the message. It was the way they preferred it to look.