ClearAttributes[s, attr] removes attr from the list of attributes of the symbol s.
ColumnWidths is an option for the low-level function GridBox which specifies the widths to use for columns.
Compiled is an option for various numerical and plotting functions which specifies whether the expressions they work with should automatically be compiled.
expr_1; expr_2; ... evaluates the expr_i in turn, giving the last one as the result.
ContinuousAction is an option for Manipulate, Slider, and related functions that specifies whether action should be taken continuously while controls are being moved.
CopyDirectory["dir_1", "dir_2"] copies the directory dir_1 to dir_2.
DataRange is an option for functions such as ListPlot and ListDensityPlot that specifies what range of actual coordinates the data should be assumed to occupy.
DeclarePackage["context`", {"name_1", "name_2", ...}] declares that Needs["context`"] should automatically be executed if a symbol with any of the specified names is ever ...
Default
(Built-in Mathematica Symbol) Default[f] gives the default value for arguments of the function f obtained with a _. pattern object. Default[f, i] gives the default value to use when _. appears as the ...
Deploy
(Built-in Mathematica Symbol) Deploy[expr] yields a deployed version of expr in which elements such as Slider, InputField, Locator, and Button are active, but general editing and selection is disabled.