To apply the Tone Curve effect

1 Select the object with the Pick tool.

2 Click Effects, Color Adjustment, Tone Curve.

3 Choose a color channel from the Channels list box.

4 Enable one of the following:

• Curve — lets you shape the curve by clicking and dragging and smoothes the distribution of values.

• Linear — lets you draw the curve by clicking and dragging but retains straight line segments between nodes.

• Freehand — lets you draw the curve by clicking and dragging.

• Gamma — lets you weigh corrections toward the midtones. If you select Gamma, you must move the Gamma slider to set a gamma curve value.

5 Do any of the following:

• Click the Options button to change the percentage of outlying pixels on either end of the tonal range.

• Click the Smooth button to smooth a freehand curve.

• Click and hold the Smooth button down to continuously smooth the tone curve.

Click the Null button to reset the Tone Curve.

• Click the Horizontal Flip button or the Vertical Flip button to invert the tone curve.

• Press ALT and right-click to change the resolution of the grid.

• Click the Invert button to flip the axis of the graph. 6 Click and drag the tone curve on the grid.

• Response curve files are saved with the extension .CRV

• Enable the Display All check box to view the tone curves for all of the image's channels at once.

• Adjust each channel's response curve separately or simultaneously by working in the composite channel.

You can undo your last action in the Tone Curve dialog box by pressing CTRL + Z.

You can press and hold CTRL to constrain the nodes to a vertical movement.

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  • degna
    What is tone curve corel draw?
    9 years ago

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