Primary Color Correction: Color Manipulation Tools - The Art and Technique of Digital Color Correction - page 126

Fig. 4.24 Color Finesse histogram display for analysis.
Fig. 4.25 Color Finesse histogram display—called “Levels”—for direct manipulation.
analysis ( Figure 4.24 ) , but in its correction tools, it provides “Levels,” which
allow you to manipulate the image in a histogram display ( Figure 4.25 ).
Avid Symphony's tool to manipulate color using a histogram display
is also called Levels.