3. Convenient Features373-5. Using 4-Point Corner to Correct Keystone Distortion[CORNERSTONE]Use the [CORNERSTONE] and [PINCUSHION] features to correct keystone (trapezoidal) distortionto make the top or bottom and the left or right side of the screen longer or shorter so that theprojected image is rectangular.Before performing correctionThe [KEYSTONE] correction has features, [KEYSTONE HORIZONTAL], [KEYSTONE VERTICAL], [PIN-CUSHION LEFT/RIGHT], [PINCUSHION TOP/BOTTOM], and [CORNERSTONE]. If the value of either[CORNERSTONE] or [PINCUSHION] has corrected, [KEYSTONE HORIZONTAL] and [KEYSTONE VERTI-CAL] are disabled. In this case, RESET the corrected values and restart to correct distortionCornerstone1. Press the ▼ button with no menu displayed.The [KEYSTONE] screen will be displayed.• Press the KEYSTONE button when usingthe remote control.2. Press the ▼ button to select [CORNER-STONE] and press the ENTER button.The [CORNERSTONE] screen will be displayed.* The drawing shows the upper left icon ( )is selected.3. Project an image so that the screen issmaller than the area of the raster.Projected image4. Pick up any one of the corners and alignthe corner of the image with a corner of thescreen.* The drawing shows the upper right corner.