Epson PERFECTION 1240U Reference Manual page 54

Tone Curve Name list
Use this list box to select a preset tone curve. There are six preset
tone curves available as shown below, and you can add your own
curves to the list using the procedure in the next section, "Saving
your own tone curve" on page 2-26.
Curve
Name
Linear
Lighten
Darken
Flat
Contrast
High
Contrast
2-24
Scanning Basics
Tone Correction dialog box
Highlight 1/4
Tone
245 192
245 193
245 152
245 182
245 204
Midtone 3/4
Tone
128 64
133 74
82 38
129 72
129 51
Shadow Description
8 Default
curve
4 Lightensdark
image
11 Darkens
bright image
2 Reduces
contrast
2 Increases
contrast