"InsertNewGraphic" is a front end token that inserts an empty graphic into the input notebook.

"InsertObject" is a front end token that opens the Insert Object dialog.

Cell Tags From In/Out Names gives the selected cell a tag that is the same as its current input or output prompt.

Undo reverses the previous action, if possible.

ControllerInformation[] gives dynamically updated information on currently connected controller devices.

ExportAutoReplacements is an option for cells that specifies which replacement rules Mathematica automatically applies when exporting text.

ImportAutoReplacements is an option for cells that specifies which replacement rules Mathematica automatically applies when importing text.

PrintPrecision is an option for selections that specifies the maximum number of digits used for displaying a machine-precision number.

RawData[data] is a low-level representation of the contents of a cell in which Show Cell Expression has been toggled.

$CommandLine is a list of strings giving the elements of the original operating system command line with which Mathematica was invoked.