"Subscript" is a front end token that creates a SubscriptBox and fills the base with a selection.

"SubsessionEvaluateCells" is a front end token that evaluates the selected cells in a kernel subsession.

"Superscript" is a front end token that creates a SuperscriptBox and fills the base with a selection.

"SystemPrintOptionsDialog" is a front end token that opens the Page Setup dialog.

"TileWindowsTall" is a front end token that arranges all windows to fit on the screen, preferring height over width.

"TileWindowsWide" is a front end token that arranges all windows to fit on the screen, preferring width over height.

"ToggleDynamicUpdating" is a front end token that toggles automatic refreshing of a Dynamic.

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

"Undo" is a front end token that undoes the most recent action.

"Ungroup" is a front end token that ungroups selected graphics.