Apple Shake 4 - Manual (Page 51)

Chapter 1 An Overview of the Shake User Interface 51
The information (node name, channels, bit depth, size, and so on) for the selected node
appears in the Viewer title bar. When the Grad node is loaded into the Viewer, the
following appears in the Viewer title bar.
Note: The channels displayed in the Viewer are the non-zero channels. Non-zero
channels are not the same as active channels. For example, a Color node set to black
(black and white values are zero) displays the alpha channel (A) in the Viewer title bar:
When the Color node is adjusted toward gray (the black and white values are no longer
zero), the black, white, and alpha channels (BWA) are displayed:
Every Viewer has the built-in capability to analyze color.
Viewer title bar