What to do if TV display is narrow or not filling up the Whole Screen? 1. Press menu from remote or decoder. 2. Select user set up from main menu. 3. then go to general settings. 4. Select aspect ratio. 5. Change settings to 16:9 if its on 4:3 or vice versa. Related articles How to scan a black decoder for SKY Pacific? How to Remove Double Channels on SKY?