The Ubutton can be used to select the color temperature for the amber (A)–blue (B) axis only. Press the Ubutton and rotate the sub-command dial until the desired value is displayed in the rear control panel (adjustments are made in mireds; 0 158). To enter a color temperature directly in increments of 10 K, press the U button and press 4 or 2 to highlight a digit and press 1 or 3 to change.
