Text Justification controls justification of cells with word wrapping.
$PerformanceGoal gives the default setting for the option PerformanceGoal for graphics and other algorithmic functions.
CellChangeTimes is an option to Cell that specifies when changes were made to the cell.
ContinuousTimeModelQ[expr] gives True if expr is a continuous-time StateSpaceModel or TransferFunctionModel object, and False otherwise.
DisplayAllSteps is an option to Animate and related functions that specifies whether all frames should be displayed in an animation, even if to do so would slow the animation ...
If
(Built-in Mathematica Symbol) If[condition, t, f] gives t if condition evaluates to True, and f if it evaluates to False. If[condition, t, f, u] gives u if condition evaluates to neither True nor False.
expr /. rules applies a rule or list of rules in an attempt to transform each subpart of an expression expr.
SetAttributes[s, attr] adds attr to the list of attributes of the symbol s.
StabilityMargins is an option to frequency response plots such as BodePlot, NyquistPlot, and NicholsPlot that specifies the gain and phase margins to be shown on the plot.
Switch
(Built-in Mathematica Symbol) Switch[expr, form_1, value_1, form_2, value_2, ...] evaluates expr, then compares it with each of the form_i in turn, evaluating and returning the value_i corresponding to ...