Apple Color 1.5 - Manual (Page 295)

Using Single Input Nodes
The simplest use of this room is to apply one or two single-input nodes to create a stylized
effect. In this case, all you need to do is add the nodes you want to use, connect them
together in the order in which you want them applied, and then add an Output node to
the very end.
In the following example, a Bleach Bypass node (which alters the saturation and contrast
of an image to simulate a chemical film process) is followed by a Curve node (to further
alter image contrast), which is followed by the Output node that must be added to the
end of all node trees.
Using Layering Nodes
A more sophisticated use of nodes is to use multi-input nodes to combine two or more
separately processed versions of the image for a combined effect.
295 Chapter 11 The Color FX Room