Printing Options sets options for printing a notebook. Mathematica saves these settings with the notebook.

AddOnHelpPath is a global option that specifies which directories are searched for additional help files used within the help system.

Alignment is an option which specifies how the contents of a displayed object should be aligned within the available area in the object.

AnimationRepetitions is an option to Animate and related functions that specifies how many times the animation they create runs before stopping.

AppendTo[s, elem] appends elem to the value of s, and resets s to the result.

AutoDelete is an option for boxes that specifies whether a box is automatically deleted when its contents are edited.

AutoItalicWords is an option for Cell that gives a list of words that should automatically be put in italics when they are entered.

BaseForm[expr, n] prints with the numbers in expr given in base n.

BitLength[n] gives the number of binary bits necessary to represent the integer n.

CellEpilog is an option for Cell which gives an expression to evaluate after each ordinary evaluation of the contents of the cell.