User guide

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Creating a luma key effect
that line’s luminance value. Adjustments made to the Keyer Controls affect
the shape and size of the luminance selector in the
Luma Plot:
¥Tip Select the Output or Matte view button to plot your clip’s current
frame.
Viewing and selecting your luminance values
There are two different ways of viewing and selecting the luminance values on
which you want to key. To switch between the views, you can click the
appropriate button, or you can use the following keyboard shortcuts:
Q for
Output, and W for Matte.
•
Output This is the default view when you first display the Custom Luma
Keys
page. You can see the result of your luma key effect in the Preview
Window
. You can click and drag in the Preview Window to select a
rectangular area containing the luminance values on which you want to key.
The tracking rectangle stays visible until you let go of the mouse button. The
keyer controls are adjusted to reflect your selected values. You can also add
to the previously selected luminance values by holding down the
CTRL key
and selecting a new rectangular area.
Luminance selector
Tracking rectangle