"Colouration mode" is a set of tools for
changing the colour of a layer. The colour of a layer can be changed completely by
clicking on one of the colours in the palette. To look through all available palettes, use
the arrow keys to the upper left and right. To look through all colours in any one
palette, use the scroll bar underneath the palette. If you don't find the colour you need,
you can select a different colour from the standard colour selection dialog. To activate
this dialog, right-click on any colour in the palette.
To smoothly modulate the colour of a layer, use the colour sliders located below the
palettes:
"Red" 
changes the number of red components in the layer.
"Green" 
changes the number of green components.
"Blue" 
changes the number of blue components.
"Hue" 
allows for a cyclical change of the layer's colour.
"Saturation" 
changes the colour saturation of the layer.
