Add/Remove Cell Tags opens a dialog box that allows you to add or remove cell tags associated with the selected cell(s).

Find searches the current notebook for matches to the text contained in the Search for: field of the dialog box.

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

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

AbortProtect[expr] evaluates expr, saving any aborts until the evaluation is complete.

AnimationDirection is an option which specifies the direction to run an animation.

Arrowheads[spec] is a graphics directive specifying that arrows that follow should have arrowheads with sizes, positions, and forms specified by spec.

AutoGeneratedPackage is an option for notebooks that specifies whether a package is automatically created when a notebook that contains initialization cells or groups is ...

BitClear[n, k] sets to 0 the bit corresponding to the coefficient of 2^k in the integer n.

BitGet[n, k] gets the bit corresponding to the coefficient of 2^k in the integer n.