Apple Color 1.0 - Manual (Page 214)

214 Chapter 10 Secondaries
To use the eyedropper to pull a secondary key:
1 Click the eyedropper.
The eyedropper becomes highlighted, and crosshairs appear superimposed over the
image in the Preview and Broadcast monitors. You use these crosshairs to sample the
HSL values from pixels in the image.
2 Move the mouse to position the crosshairs on a pixel with the color you want to key
on, and click once to sample color from a single pixel.
The crosshairs disappear, and the HSL controls are adjusted to include the sampled
values in order to create the keyed matte. In addition, the Enabled button turns on
automatically (which turns on the effect of the secondary operation in that tab). The
Previews tab becomes selected in the middle of the Secondaries room, showing the
keyed matte that’s being created by the HSL qualifiers (for more information, see
“
Previews Tab ” on page 219).
Once you’ve created the keyed mate, the next step is to use the color correction
controls at the top of the Secondaries room to actually make the correction. For more
information, see Chapter 9, “
Primary In ,” on page 163.