Horizontal Lines opens a submenu to insert a line of the specified thickness above or below the selected cell.
Move to Back moves selected graphics objects to the back of the display.
Move to Front moves selected graphics objects to the front of the display.
Page Setup controls the size and shape of the pages to be printed.
Online Registration opens the Mathematica registration website.
Show Cell Tags toggles the display of cell tags in a notebook.
Show Debugger Tools Window toggles the display of the Debugger Tools window on or off.
Show Stack Window toggles the display of the evaluation stack window on or off.
Speak Selection speaks the contents of a single selected cell.
Step makes the debugger stop at the beginning of the next expression.