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The Master Wheels, located below the Color Balance controls, let you adjust the YRGB channels for a particular range of image tonality together. This has the practical effect of letting you adjust image lightness and contrast.
Lift, Gamma, and Gain or Shadow, Midtone, and Highlight, plus Offset master wheels to adjust contrast
The Master Wheels correspond to the rings surrounding the trackballs on all of the DaVinci control panels, which let you modify image contrast via YRGB adjustment (as opposed to modifying image contrast via Y-only adjustment, discussed later in this chapter).
— Dragging a Master Wheel to the left makes the corresponding tonal region of the image darker, and dragging it to the right makes that tonal region of the image lighter. The effect will vary according to the mode you’re in. As you make an adjustment, the YRGB parameters
located underneath all change together to reflect the simultaneous adjustment you’re making to all channels.
Numeric Parameters
Each Color Balance Control and Master Wheel pair of controls also have a set of four YRGB number fields underneath that display the YRGB adjustment being made by both controls. These four values encompass every color and master adjustment you can make with these controls, and they also directly correspond to the Bars interface that mirrors the Wheels controls.
These fields can be edited like any other parameter on the Color page. Even though these values display two decimal places of precision because of space restrictions in the interface, they really contain three decimal places of precision since these are floating point operations; you just can’t see the third decimal place.
— You can double-click on a field to edit its value numerically.
— You can insert the text cursor next to a value in this field, and use the Up and Down Arrow keys to adjust the value one digit at a time.
— You can cut, copy, and paste values among fields.
— You can click on the field and drag left or right to adjust its value with a virtual slider.
The number fields for each Color Balance Control and Master Wheel are editable.