Thanks for posting. Do you have a separate Chromecast device or your Vizio TV has a built-in Chromecast?
If you only have a TV that has a built-in Chromecast, please be advised that the changes in the features and settings of the TV that has a Chromecast built-in are decided by the manufacturers. I would suggest that you reach out to Vizio for further help. You may contact them here.