Selectable is an option for displayed objects, cells, and notebooks that specifies whether their contents can be selected interactively using the front end.
Setter
(Built-in Mathematica Symbol) 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 ...
ShowAutoStyles is an option for Cell that specifies whether styles that are specified to be automatically used for various syntactic and other constructs should be shown.
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 ...
Slider2D[{x, y}] represents a 2D slider with settings x and y in the range 0 to 1. Slider2D[Dynamic[pt]] takes the setting to be the dynamically updated current value of pt, ...
SoundVolume is an option to Sound and SoundNote and related functions that specifies the relative volume of the sound produced.
SplineDegree is an option for spline functions and graphics primitives that specifies the degree of polynomial basis to use.
StreamColorFunctionScaling is an option for graphics functions that specifies whether arguments supplied to a stream color function should be scaled to lie between 0 and 1.
StringPosition["string", " sub"] gives a list of the starting and ending character positions at which " sub" appears as a substring of " string". StringPosition["string", ...
f /: lhs =. removes any rules defined for lhs, associated with the symbol f.