Color gradient is a palette with 255 entries used as one of color schemes available for drawing. Mask value [0-255] is now used as an index for fatching color from gradient palette.

Gradient Settings

The form below is pop-uped when G button near color rectangles is pressed (shortcut key : Shift + F2)

You can create color gradient palette in several ways.
First, you must enter desired palette index into edit field or using slider. Then, you may select the color associated to given index. You can then select desired color by clicking on upper right color shape (color dialog will pop-up) or you can select color from bottom right gradient color picker by double click.

Color index will be associated with given color, while surrounding color indexes will be interpolated giving smooth color transition (fall).

If Linear fall is selected, transition is performed through linear fuction, while Quadratic fall performs faster (quadratic) transition between specified colors. In other words, with linear fall, selected color will be interpolated over wider area of palette and with quadratic fall, this area will be narowed.