"ShowPageBreaks" is a front end token that displays page breaks on screen as they would be printed.

"ToggleShowExpression" is a front end token that toggles between the Cell expression form and display form of a cell.

ShowPageBreaks is a notebook option that specifies whether to indicate in the on-screen display of a notebook where page breaks would occur if the notebook were printed.

Show Breakpoints Window toggles the Breakpoints window on or off.

ShowShortBoxForm is an option for cells that specifies whether box expressions, which are used to represent two-dimensional forms in a cell, are displayed in a more compact ...

Font opens a dialog to view and edit font, font style, size, and other text options.

Show Debugger Tools Window toggles the display of the Debugger Tools window on or off.

Show Stack Window toggles the display of the evaluation stack window on or off.

JavaShow[window] causes the specified Java window to be brought to the foreground, so that it appears in front of notebook windows.

Show Cell Tags toggles the display of cell tags in a notebook.