Canon CanoScan FB 630U User Manual - Page 57
image color and output image color. When you add a handle
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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. 57