36Changing the screen size― After changing the screen size, the monitor may need to be calibrated again.― To calibrate the monitor again, refer to "Calibration" on page 25.In PC modeIn AV modeChange the screen size as follows.Displayed options can vary between PC mode and AV mode.See page 38 for details on how to enable PC or AV mode.― Press one of the four buttons, other than the power button, found at the bottom right front of the product. The key guidewill appear.1 Tap the button from the key guide.2 Go to using the buttons, and tap .3 Go to the desired option using the buttons, and tap .• In PC mode: Stretch the picture to full screen regardless of the aspect ratio of the input source.: Display the picture according to the aspect ratio of the input source.• In AV mode: This mode is suitable to view the 4:3 aspect ratio picture of video content or standard broadcasts.: This mode is suitable to view the 16:9 aspect ratio picture of DVD content or widescreen broadcasts.: This mode displays input without truncating the original picture.4 Changes are applied and the OSD menu is closed.