Apple Color 1.5 - Manual (Page 212)

Using the Primary Contrast Controls
The primary contrast controls consist of three vertical sliders that are used to adjust the
black point, the distribution of midtones, and the white point of the image.
Adjusts black point Adjusts midtones distribution Adjusts white point
Output: 0.00h 0.00s 0.001 Output: 0.00h 0.00s 0.501 Output: 0.00h 0.00s 1.001
Shadow Midtone Highlight
Each slider is a vertical gradient. Dragging down lowers its value, while dragging up raises
its value. A blue bar shows the current level at which each slider is set, while the third
number in the Output display (labeled L) below each color control shows that slider's
numeric value. Contrast adjustment is a big topic. For more information, see:
• Adjusting the Black Point with the Shadow Slider
• Adjusting the Midtones with the Midtone Slider
• Adjusting the White Point with the Highlight Slider
• Expanding and Reducing Image Contrast
• Contrast Affects Color Balance Control Operation
Using Contrast Sliders with a Control Surface
In the Primary In, Secondaries, and Primary Out rooms, the three contrast sliders usually
correspond to three contrast rings, wheels, or knobs on compatible control surfaces.
Whereas you can adjust only one contrast slider at a time using the onscreen controls
with a mouse, you can adjust all three contrast controls simultaneously using a hardware
control surface.
When you’re using a control surface, the Encoder Sensitivity parameter in the User Prefs
tab of the Setup room lets you customize the speed with which these controls make
adjustments. For more information, see
Control Surface Settings .
212 Chapter 9 The Primary In Room