Riffle[{e_1, e_2, ...}, x] gives {e_1, x, e_2, x, ...}. Riffle[{e_1, e_2, ...}, {x_1, x_2, ...}] gives {e_1, x_1, e_2, x_2, ...}. Riffle[list, x, n] yields a list in which ...

RotationAction is an option for three-dimensional graphics functions that specifies how to render 3D objects when they are interactively rotated.

RowSpacings is an option for the low-level function GridBox that specifies the spaces in x heights that should be inserted between successive rows.

SequenceHold is an attribute that specifies that Sequence objects appearing in the arguments of a function should not automatically be flattened out.

SetStreamPosition[stream, n] sets the current point in an open stream.

SetSystemOptions["name" -> value] resets the value for the internal system option with the specified name.

Setter[x, val] represents a setter button whose setting x is set to val when the button is clicked. The button is labeled with val, and appears pressed if the value of x is ...

ShearingMatrix[\[Theta], v, n] gives the matrix corresponding to shearing by \[Theta] radians along the direction of the vector v, and normal to the vector n.

ShearingTransform[\[Theta], v, n] gives a TransformationFunction that represents a shear by \[Theta] radians along the direction of the vector v, normal to the vector n, and ...

ShowGroupOpener is an option for cells that specifies whether an opener icon is displayed next to the leading cell in a cell group to indicate whether the cell group is open ...