Canon EOS-1D C - Manual (Page 135)

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3 Selecting a Picture Style
The symbols of the Picture Style selection screen refer to parameters
such as [Sharpness] and [Contrast]. The numerals indicate the
parameter settings, such as [Sharpness] and [Contrast], for each
Picture Style.
Symbols
About the Symbols
g Sharpness
h Contrast
i Saturation
j Color tone
k Filter effect (Monochrome)
l Toning effect (Monochrome)
COP
Y