Stack Windows arranges windows in a uniform overlapping stack on the screen (Windows and Macintosh only).

Typesetting opens a submenu of common typesetting actions.

Ungroup Cells/Group Normally ungroups the selected sequence of cells.

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

AbsoluteThickness[d] is a graphics directive which specifies that lines which follow are to be drawn with absolute thickness d.

AnchoredSearch is an option for Find and FindList that specifies whether the text searched for must be at the beginning of a record.

Backslash[x, y, ...] displays as x\[Backslash]y\[Backslash]....

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

Because[x, y] displays as x \[Because] y.

BracketingBar[x, y, ...] displays as |x, y, ...|.