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Step 4 - Display Type
This step allows you to select the type of display you are calibrating so that SuperCal can alter the calibration patterns to match the characteristics of your display.
Because some displays like projectors and CRTs tend to blur the pixels that are displayed, SuperCal uses larger measurement patterns that are specifically oriented to match the characteristics of the display type. For digital LCDs running at their native resolution, SuperCal uses smaller measurement patterns that are easier to work with and yield better results.
If you an LCD connected with an analog connection or running at a non-native resolution, you should select a different option...
First, if you have an LCD connected to the video card through an analog video connection (HD-15), you should use the Projector setting instead of the LCD setting. This is because the very small patterns of the LCD setting will be negatively affected by the blurring that occurs on an LCD with an analog connection.
Second, if you have an LCD that is not running at its native resolution, you should make one of the following choices. You can either leave the display at the non-native resolution and use the use the Projector setting, or you can temporarily change the display to its native resolution (using the Display pane in the System Preferences), select the LCD option, calibrate the display, then change the resolution back to the preferred non-native resolution after calibration is complete.
If you need to determine the resolution setting for your video card, open the Displays preferences pane in the System Preferences and look at the current selection under the Display tab (as shown below). Compare this setting with the specifications for your display. If the resolution setting for your video card is not the same as the maximum, native resolution of your LCD, then your display is not running at its native resolution.