Epson PERFECTION 1240U Reference Manual page 83

Click the Tone Correction button on the Manual mode window
to view the following dialog box.
Note:
❏ The default setting is the Linear.
❏ The Tone Correction button appears dimmed and is not available
when Pixel Depth is set to Black & White and Halftone is set to
None, or B/W Option is set to Text Enhancement
Technology in the Image Type dialog box.
❏ You can see the effects of the Tone Correction settings in the Preview
window.
The tone value represents the contrast in the tonal relationship
between an original image and its reproduction on a monitor or
printer.
Tone Curve Name list:
Select a tone correction setting from this list. The custom settings
you have saved appear in this list.
Understanding EPSON TWAIN Features
3-23