If the previous use of the time is full screen, now suddenly can not be full screen, then it may be between the phone software anomaly, in this case, it is the phone off the phone after restarting, it should be restored to normal.
Square dancing is an art form performed in squares, and is a rhythmic dance performed by residents in squares, courtyards, and other open spaces for fitness purposes, usually accompanied by high decibel, rhythmic music.