Saving Your Own Tone Curve - Epson Perfection 640U Reference Manual

Output values
These are the current values for output data in accordance with
the current locations of the points inside the tone curve editor.
These values change when you drag points in the tone curve
editor, or you can enter values here to change the shape of the
tone curve. Each value can be adjusted within the range of 0 to 255.
Note:
❏ Each output value name has a check box to the left of it. Highlight
and Shadow are always selected, but you can select or clear 1/4 Tone,
Midtone, and 3/4 Tone by clicking their check boxes.
❏ When a value's check box is clear, its point on the tone curve editor
automatically shifts to smooth out the tone curve when one of the
other points is moved.
❏ When a value's check box is selected, it means that its point is fixed
and it will not shift when other points are moved.

Saving your own tone curve

Use the following procedure to assign a name to a tone curve you
have customized and want to save for later use:
1. Modify the tone curve settings as described. This causes the
name shown in the Tone Curve Name list to change to User
Defined.
2. After customizing the tone curve, enter a name for the new
curve (up to 32 characters) in the list box.
3. Click Save to save your new tone curve settings under the
name you specified.
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