Virtual Book opens the Wolfram Mathematica Virtual Book, an updated and expanded electronic version of The Mathematica Book.

Welcome Screen opens the Welcome Screen, which appears by default each time you start Mathematica.

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

Why the Coloring? opens a dialog that explains any syntax coloring in the active notebook.

Wolfram Website opens the main Wolfram Research website in a web brower.

Word Wrapping opens a submenu of word wrapping styles

Wrap at Paper Width wraps lines at the width of the paper currently specified by the print settings.

Wrap at Window Width wraps lines at the width of the window containing the text.

X Environment Information opens a dialog box that displays the current attributes of the X front end environment (X only).

Mathematica options starts the full Mathematica system including notebook interface on Windows and Mac.