"DebuggerStep" is a front end token that stops the evaluation at the beginning of the next expression.

"DebuggerStepOut" is a front end token that stops the evaluation at the end of the current stack frame.

"DebuggerToggleBreakpoint" is a front end token that converts all messages generated during the evaluation into breakpoints.

"DeleteGeneratedCells" is a front end token that deletes all cells in the notebook that have been produced as output by the kernel.

"DuplicatePreviousInput" is a front end token that duplicates the contents of the nearest input cell above.

"DuplicatePreviousOutput" is a front end token that duplicates the contents of the nearest output cell above.

"EvaluatorHalt" is a front end token that interrupts the current evaluation and displays the evaluation stack.

"FindDialog" is a front end token that selects the next occurrence of the text contained in the Search for: field of the Find dialog.

"FontColorDialog" is a front end token that opens the Color dialog to set the color for selected text.

"FontPanel" is a front end token that opens the Font dialog.