Change video recording size of sony erricsion k770i?

how can i change the change video recording size of sony erricsion k770i. plz help me.|||hey its simple....open camera - go right for video - in video select options then quality in that make it high quality resolution instead of mms quality....|||Settings|||in the camera, select settings, you can select clip for MMS or high quality in that menu. but you can change the resolution