Padding
(Built-in Mathematica Symbol) Padding is an option to various array and image operations that specifies what padding to use when extending beyond the original data specified.
PreemptProtect[expr] evaluates expr, without any interruption from preemptive evaluations.
ResetDirectory[] resets the current working directory to its previous value.
RowsEqual is an option for the low-level function GridBox that specifies whether all rows in the grid should be assigned equal total height.
SessionTime[] gives the total number of seconds of real time that have elapsed since the beginning of your Mathematica session.
SetDirectory["dir"] sets the current working directory to dir. SetDirectory[] sets the current working directory to your "home" directory.
ShowCellLabel is an option for Cell that specifies whether to display the label for a cell.
ShrinkingDelay is an option for dynamic objects that specifies how long to delay before shrinking the size of the region in which the object is displayed to the actual size ...
Skip
(Built-in Mathematica Symbol) Skip[stream, type] skips one object of the specified type in an input stream. Skip[stream, type, n] skips n objects of the specified type.
SpellingDictionaries -> {opt_1 -> val_1, opt_2 -> val_2, ...} is a global option that specifies settings for spell checking.