File > Close All (Mathematica Menu Item)

Close All closes all open notebooks (Windows only).

File > Close (Mathematica Menu Item)

Close closes the current notebook.

Insert > Color… (Mathematica Menu Item)

Color opens a dialog for choosing a color.

Evaluation > Debugger (Mathematica Menu Item)

Debugger opens the control palette for the debugger.

[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.

Help > Documentation Center (Mathematica Menu Item)

Documentation Center opens the Wolfram Mathematica Documentation Center.

Evaluation > Dynamic Updating Enabled (Mathematica Menu Item)

Dynamic Updating Enabled toggles automatic evaluation associated with dynamic objects.

Cell > Cell Properties > Editable (Mathematica Menu Item)

Editable toggles whether a cell can be edited or not.

Edit > Enter Selection (Mathematica Menu Item)

Enter Selection places a selection into the Search for: field of the Find dialog box.

Cell > Cell Properties > Evaluatable (Mathematica Menu Item)

Evaluatable toggles a cell between evaluatable and unevaluatable. Only evaluatable cells can be sent to the kernel.