This is a text description of syntax2.gif. This image shows a syntax diagram, which shows the following available options for 4-BIT and 8-BIT operator vlaues:
LUT RGB
LUT RGB A
LUT RGB T
LUT GRAY
LUT GRAY SCALE
LUT GRAY A
LUT GRAY T
LUT GRAY SCALE A
LUT GRAY SCALE T
In the preceding list, the spelling G-R-A-Y can substituted with the spelling G-R-E-Y.