MATHEMATICA FRONT END TOKEN

"CellSplit"

This token has not been fully integrated into the long-term Mathematica system, and is subject to change.

is a front end token that splits a cell into two or three cells.

Details Details

is equivalent to Cell ► Divide Cell.
If is used at an insertion point, then the cell divides into two cells at that point.
If is used on a text selection, the cell divides into three cells: one cell for everything before the selection, the second cell for the selection, and the third cell for everything after the selection.
A typical use is FrontEndExecute[FrontEndToken["CellSplit"]].