Canon CanoScan FB 630U User Manual page 57

chapter 5
What is on
the ScanGear CS
Main Window?
Top Page
Glossary
Contents
Index
Here are some hints for editing curves:
• Curve handles are drawn on a white background as a red dot
to signify that they are editable. When the cursor is over the
handle, it changes to a crosshair.
• Curve end points can be selected and dragged to any point in
the curve but cannot be deleted.
• Up to 15 points can be added to a curve by clicking anywhere
in the curve box.
• If you drag a point outside of a curve box, it will be deleted
from the curve and a new curve will form with the remaining
points.
• The X and Y axes on the curve chart represent the input
image color and output image color. When you add a handle
to the curve and drag that handle toward the white areas,
the preview image tones are adjusted to reflect the change.
• More than one handle cannot be positioned on a vertical line
but more than one handle can be positioned on a horizontal
line so you can have several handles on a horizontal line.
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