This correction allows you remap the image colors with a Bezier curve. The control also allows you to save and load .acv curve files from Adobe PhotoShop.
Controlling the View
Use the mouse wheel to zoom in and out of the curve view by both axes. Alternatively, use Alt + Right-mouse button to zoom in/out by the axis in which the first mouse movement is detected. Moving right or left locks the vertical axis and allows zooming in/out only the horizontal axis. Moving up or down locks the horizontal axis and allows zooming in/out only the vertical axis.
Drag with the middle mouse button or Hold Shift + Mouse Left button + mouse move to pan.
Controlling the Bezier Points
Click on a point to select it. Draw a rectangle to select multiple points at once. Click and drag on a selected point or its tangents to move them. Alternately, select a point, then hold Alt while moving it. Moving right or left locks the vertical axis and allows moving only along the horizontal axis. Moving up or down locks the horizontal axis and allows moving only along the vertical axis. To add a new point, double click on the curve. To delete points, select them and press Del. Once a point is selected, you can also use the input coordinates field to modify its position. To display the input coordinates field either press Enter or right-click on the point and then select Edit point.
Right-click on a point to bring up a context menu with additional options for that point.
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Context Menu
Right-clicking in the curve view brings up a context menu with additional options:
Menu Item
Description
Zoom all
Adjust the curve view so that all points are visible.
Undo/Redo
Undo and redo modifications to the curve.
Load
Load the curve control from a file. Two formats are available: native .bcurve and PhotoShop .acv.
Save
Save the curve control to a file. Two formats are available: native .bcurve and PhotoShop .acv.
Reset Master
Reset the curve control to its default state.
Select internal only
Select only the points which are currently visible in the curve view.
Select all
Select all points.
Snap to grid
Toggle snapping to the curve grid. When enabled, moving points snaps them to the grid nodes.
