Adjusting ChromaCurve Graphs
You can have sixteen control points in a Curves tab ChromaCurve graph. Graphs must always have at least two control points. Avid Color Correction sets default control points such that input and output values are the same across the entire range of colors.
To add a control point:
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Click the curve line in the graph at the point where you want the new
point to appear.
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A new control point appears with a circle around it to indicate that it is
the active control point.
To select a control point:
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Click the control point you want to select.
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A circle appears around the control point to indicate that it is the active
control point.
To move a control point, do one of the following:
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Click the control point, press and hold the mouse button, and drag the
control point to the location on the graph where you want to place the
point.
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The curve updates as you drag the control point.
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Type input and output values for the position of the control point in the
Input and Output text boxes below the ChromaCurve graph. You must
press Enter (Windows) or Return (Macintosh) after typing a value for
it to take effect.
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![](/file/23437/Chip_2004-08_cd2.bin/avid_dvfree/info/XpressFree.chm/images/note.gif) | |
You can "nudge" the numerical value of a control up or down by small
increments. To do this, click in the text box, and then press the Up Arrow
key to increase the value or the Down Arrow key to decrease the value.
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To delete a control point:
1. | |
Click the control point to activate it.
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A circle appears around the control point.
2. | |
Make sure the pointer is over the ChromaCurve graph that contains the
control point you want to delete.
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![](/file/23437/Chip_2004-08_cd2.bin/avid_dvfree/info/XpressFree.chm/images/note.gif) | |
A curve is defined by at least two control points. If you have only two
control points set in a ChromaCurve graph, you cannot delete one.
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To anchor a portion of the curve so it does not move when you are
making other adjustments:
1. | |
Place two control points at either end of the portion of the curve you
want to anchor.
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2. | |
Place a third control point very close to the point that separates the
portion of the curve you want to anchor from the portion of the curve
you want to adjust.
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3. | |
Place a fourth control point on the portion of the curve you want to
adjust.
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Now when you drag the new control point to adjust the curve, the
portion of the curve between the first two control points will not move.