PrintTemporary[expr] prints expr as a temporary cell in a notebook, removing it when the evaluation of the current input line is complete.
RecordSeparators is an option for Read, Find, and related functions that specifies the list of strings to be taken as delimiters for records.
RenameDirectory["dir_1", "dir_2"] renames the directory dir_1 to dir_2.
Return
(Built-in Mathematica Symbol) Return[expr] returns the value expr from a function. Return[] returns the value Null.
ReverseGraph[g] gives the reverse graph of the directed g.
RowLines is an option for the low-level function GridBox that specifies whether lines should be drawn between adjacent rows.
Selectable is an option for displayed objects, cells, and notebooks that specifies whether their contents can be selected interactively using the front end.
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.
ShowStringCharacters is an option for Cell that specifies whether to display " when a string is entered.
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 ...