My wife was cleaning the front of our flat screen tv ....she must of hit one of the buttons on the front of the TV ....the picture went smaller How do i get it back to normal size?

Can't changes tv picture screen sizes,when the tv is off.She is cleaning the tv,when it is off wright?Yes.Than the tv programming u are watching stay small screen size the whole entire times even different seen or in commercials?Tv even in difference tv channels,screen sizes are small too?Sometimes tv changes screen sizes by itself to fit the tv programming it is playing to fit it prgramming format it displaying.Still have all small screen sizes all the tv channels.Tv must be on and playing.U have the tv original remote wright?Yes.Try looking on ur tv remote control look for a buttons said like Aspect Ratio,Picture Sizes,ZOOM or VIEWMODE buttons,by pushing one of these buttons on the remote should able to changes tv picture screen sizes.

Go to remot and press zoom