File > Printing Settings > Show Page ... (Mathematica Menu Item)

Show Page Breaks calculates and displays page breaks on screen.

ShowCellTags (Built-in Mathematica Symbol)

ShowCellTags is an option for Cell that specifies whether to display tags for a cell.

ShowContents (Built-in Mathematica Symbol)

ShowContents is an option for selections that specifies whether an object represented by a StyleBox should be displayed on the screen or replaced by blank space.

ShowAutoStyles (Built-in Mathematica Symbol)

ShowAutoStyles is an option for Cell that specifies whether styles that are specified to be automatically used for various syntactic and other constructs should be shown.

ShowCellBracket (Built-in Mathematica Symbol)

ShowCellBracket is an option for Cell that specifies whether to display the bracket that indicates the extent of the cell.

ShowCellLabel (Built-in Mathematica Symbol)

ShowCellLabel is an option for Cell that specifies whether to display the label for a cell.

ShowCursorTracker (Built-in Mathematica Symbol)

ShowCursorTracker is an option for Cell that specifies whether an elliptical spot should appear momentarily to guide the eye if the cursor position jumps.

ShowSpecialCharacters (Built-in Mathematica Symbol)

ShowSpecialCharacters is an option for Style and Cell that specifies whether to replace \[Name], \:nnnn, etc. by explicit special characters.

Window Menu (Mathematica Guide)

ShowClosedCellArea (Built-in Mathematica Symbol)

ShowClosedCellArea is an option for cells that specifies whether a rectangular bar is displayed next to a closed cell group to indicate the number of cells in the group.