[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 > Divide Cell (Mathematica Menu Item)

Divide Cell splits a cell at the insertion point.

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

Front View sets the view point for the selected (or clicked upon) 3D graphic to the default front orientation.

Window > Full Screen (Mathematica Menu Item)

Full Screen toggles between full screen and normal display for the current notebook.

[Right-click] > Get Help (Mathematica Menu Item)

Get Help opens documentation about the selected function.

[Right-click] > Get Indices (Mathematica Menu Item)

Get Indices displays the approximate coordinate values of the mouse position.

[Right-click] > Insert New Cell (Mathematica Menu Item)

Insert New Cell creates a new cell with the selected style at the cell insertion point.

Insert > Table/Matrix > New... (Mathematica Menu Item)

New opens a dialog for generating a table or matrix.

Cell > Grouping > Open/Close Group (Mathematica Menu Item)

Open/Close Group toggles a cell group between open and closed. Closing a group collapses all cells in the group so that only the head cell is visible.

Evaluation > Parallel Kernel Status... (Mathematica Menu Item)

Parallel Kernel Status opens a dialog with statistics on active parallel kernels.