Apple Color 1.0 User Manual download pdf (Page 215)

Chapter 10 Secondaries 215

In addition to sampling individual color values, you can also use the eyedropper to

sample an entire range of values.

To use the eyedropper to sample a range of values:

m Click the eyedropper, then drag over the range of pixels you want to sample with the

crosshairs.

The HSL controls expand to include the entire range of hues, saturation, and lightness

in the pixels you sampled. As a result, the keyed matte in the Previews tab is much

more inclusive.

You can also use the eyedropper to expand an existing range of HSL values.

To expand the HSL selection using the eyedropper:

m Click the eyedropper, then hold the Shift key down and either click a single pixel or

drag over a range of pixels with the crosshairs.

The crosshairs disappear, and the HSL controls are expanded to include the range of

sampled values you dragged on to expand the keyed matte in the Previews tab.

Note: When selecting a range of multiple HSL values, you can only select a contiguous

range of values. You cannot, for example, exclude yellow if you’ve included both red

and green (assuming you also need to exclude blue, as seen in the screenshot below).

If you need to select discontiguous HSL ranges, you should use multiple secondary

operations.

The HSL Controls

You don’t have to use the eyedropper to select a range of HSL values. You can also use

the HSL controls at the top of the Basic tab to select specific ranges of hue, saturation,

and lightness directly.

Each of these qualifiers can be turned on and off individually. Each qualifier that’s

turned on contributes to the keyed matte. Turning a qualifier off means that aspect of

color is not used.

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Apple Color 1.0 User Manual Page 215