NormalsFunction is an option for Plot3D and related functions that specifies a function to apply to determine the effective surface normals at every point.
CounterFunction is an option for counters that specifies the symbols used to display the value of the counter.
ColorFunction is an option for graphics functions that specifies a function to apply to determine colors of elements.
RegionFunction is an option for plotting functions that specifies the region to include in the plot drawn.
StreamColorFunction is an option for StreamPlot and related functions that specifies a function to apply to determine colors along streamlines.
VectorColorFunction is an option for VectorPlot and related functions which specifies a function to apply to determine colors of field vectors drawn.
TransferFunctionZeros[tf] gives a matrix of roots of the numerators in the TransferFunctionModel object tf.
DistanceFunction is an option for functions such as Nearest that specifies the distance value to assume between any two specified points.
"CopySpecial" is a front end token that converts the selection to a specified format and copies it to the clipboard.
"PasteSpecial" is a front end token that pastes the clipboard contents in plain text format at the insertion point.