Edit > Cut (Mathematica Menu Item)

Cut deletes a selection and pastes it to the clipboard.

Evaluation > Debugger Controls (Mathematica Menu Item)

Debugger Controls opens a submenu of debugger controls.

Evaluation > Debugger (Mathematica Menu Item)

Debugger opens the control palette for the debugger.

Evaluation > Default Kernel (Mathematica Menu Item)

Default Kernel specifies the default kernel for all calculations.

[Right-click] > Default View (Mathematica Menu Item)

Default View resets the view point for the selected (or clicked upon) 3D graphic to the default orientation.

Cell > Delete All Output (Mathematica Menu Item)

Delete All Output deletes all output cells in the current notebook.

File > New > Demonstration (Mathematica Menu Item)

Demonstration creates a new Demonstration notebook.

Help > Demonstrations (Mathematica Menu Item)

Demonstrations opens the Wolfram Demonstrations Project website.

Cell > Divide Cell (Mathematica Menu Item)

Divide Cell splits a cell at the insertion point.

Help > Documentation Center (Mathematica Menu Item)

Documentation Center opens the Wolfram Mathematica Documentation Center.