ORIS PDF Tuner Version 4.4.8 User Manual - image2output - Support

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Gradation Changes and Tone Value Corrections
How to Change Color Gradations
rent color separation. The current separation is indicated in the status
area of the COLOR GRADATION window (see Fig. 25-12).
It is possible to treat the channels of RGB images as CMY separations.
To do so, click RGB/CMY in the menu of the COLOR GRADATION window.
This interchanges the X and Y values of the curve point coordinates so
that curves are mirrored (see Fig. 25-2).
Changing Gradations in ‘Spline’ Mode
In the Spline mode you specify points which are connected automatically
by curved lines. When you select this mode, a linear curve appears that
has two default points: the starting and the ending point (see Fig. 25-1).
You can modify the curve by adding, moving and deleting points.
Adding Gradation Points
Simply click to add a new point to a gradation curve.
Alternatively, enter the point’s coordinate into the boxes at the bottom of
the COLOR GRADATION window. The coordinates range from 0/0 (lower
left corner) to 100/100 (upper right corner). Press TAB after each input.
The coordinates are displayed in the status area on the left-hand side of
the COLOR GRADATION window (see Fig. 25-12).
Moving Gradation Points
You can drag any point to another position with the mouse button
pressed down.
The point moved or clicked last is active and therefore marked with a
cursor. This point can be moved up and down in very small increments.
To do so, position the cursor anywhere inside the curve’s display area.
Then CTRL-click (Mac OS) or right-click (Windows) repeatedly to move
the point up. Additionally press the SHIFT key to move it down. Each
mouse click moves the point by 1%.
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