Edit > Check Spelling... (Mathematica Menu Item)

Check Spelling opens the Check Spelling dialog box and searches for misspelled words.

BoxStyle (Built-in Mathematica Symbol)

BoxStyle is an option for three-dimensional graphics functions that specifies how the bounding box should be rendered.

ColumnLines (Built-in Mathematica Symbol)

ColumnLines is an option for the low-level function GridBox which specifies whether lines should be drawn between adjacent columns.

DeleteContents (Built-in Mathematica Symbol)

DeleteContents is an option for DeleteDirectory that specifies whether the contents of directories should automatically be deleted.

DockedCells (Built-in Mathematica Symbol)

DockedCells is an option for notebooks that gives a list of cells that are to be displayed "docked" at the top of the notebook.

RowLines (Built-in Mathematica Symbol)

RowLines is an option for the low-level function GridBox that specifies whether lines should be drawn between adjacent rows.

WordSeparators (Built-in Mathematica Symbol)

WordSeparators is an option for Read, Find, and related functions that specifies the list of strings to be taken as delimiters for words.

Density and Contour Plots (Mathematica Tutorial)

Density and contour plots. This gives a density plot of sin(x) sin(y). Lighter regions show higher values of the function. Some options for DensityPlot.

Pattern Sequences (Mathematica Tutorial)

In some cases you may need to specify pattern sequences that are more intricate than things like x__ or x..; for such situations you can use PatternSequence[p_1,p_2,…]. ...

CentralMoment (Built-in Mathematica Symbol)

CentralMoment[list, r] gives the r\[Null]^th central moment of the elements in list with respect to their mean.CentralMoment[dist, r] gives the r\[Null]^th central moment of ...