Insert > Picture > New Graphic (Mathematica Menu Item)

New Graphic creates a new graphic at the insertion point.

Cell > Notebook History... (Mathematica Menu Item)

Notebook History displays a time record of changes made in the input notebook.

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

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

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

Show Cell toggles between the expression and display forms of a cell.

Edit > Undo (Mathematica Menu Item)

Undo reverses the previous action, if possible.

Help > Why the Beep?... (Mathematica Menu Item)

Why the Beep? opens a dialog with an explanation of why the front end produced a beep.

Backward (Built-in Mathematica Symbol)

Backward is a symbol that represents the backward direction for purposes of motion and animation.

CanberraDistance (Built-in Mathematica Symbol)

CanberraDistance[u, v] gives the Canberra distance between vectors u and v.

ControllerInformation (Built-in Mathematica Symbol)

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

DialogNotebook (Built-in Mathematica Symbol)

DialogNotebook[{cell_1, cell_2, ...}] represents a dialog notebook that can be manipulated by the Mathematica front end.