"Above" is a front end token that creates an OverscriptBox and fills the base with a selection.

"BackgroundDialog" is a front end token that opens the Color dialog to set the background color for selected cells or text.

"Balance" is a front end token that expands the selection to cover the nearest pair of matched bracketing characters.

"Below" is a front end token that creates an UnderscriptBox and fills the base with a selection.

"CellContextDialog" is a front end token that opens the Cell Context dialog.

"Clear" is a front end token that deletes a selection without copying it to the clipboard.

"CompleteSelection" is a front end token that opens a popup menu to complete a partially typed word.

"Copy" is a front end token that copies a selection to the clipboard without deleting it from the document.

"Cut" is a front end token that deletes the current selection and copies it to the clipboard.