How do you recalibrate a Sanyo Zio cell phone?

[Justin W]

I need to know how to recalibrate my Sanyo zio I've looked on many websites but the directions don't make since there isn't a display and sound button but there is a sound button and display button and when I click display, there isnt a calibrate button there are 4 options: brightness, auto rotate screen, animation, key backlight, and screen timeout. I need help!!!