Determine the Native Gamma of the Display

The checklist down the left side of the Display Calibrator Assistant dialog is only a guide and not all steps will be applicable to all display types. The following screenshot shows the first of  five steps used to determine the native gamma of the display. This arrangement is an improvement on the old scheme used by Apple and was developed because they recognised the difficulty many users had in adjusting the blue channel gamma. In each step you will be adjusting the Brightness and Tint thus obtaining much finer control of the gamma curves.

• Begin by adjusting the Brightness slider (1) vertically so that the apple symbol blends with the background.

• Next using the Tint slider (2) trim out any colour imbalance that may be present. You may need to readjust the left hand brightness slider a little more after this step.

• It's helpful to squint when trying to blend the inner and outer shapes.

 

Native Gamma - Brightness and Tint Adjustment

The remaining four steps are basically a repeat of the first but effect other parts of the gamma curve. You should follow the instructions given by Apple in the dialogs.

 

Step 2 - Fine-tuning the Mid-tone Response

 

Step 3 - Fine-tuning the 3/4-tone Response