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 Documentation / Mathematica / Other Information / Menu Commands / Cell Menu  /
Divide Cell

▪ Divide Cell splits a cell at the current insertion point.
▪ This command splits the selected cell into two or three cells, depending on the current text selection.
▪ An insertion point divides the cell in two. A text selection divides the cell into three cells: everything before the beginning of the selection, the selection itself, and everything after the end of the selection.
▪ Keyboard shortcuts: D ; D D