This is documentation for Mathematica 5, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)

Documentation / Mathematica / Front End / Menu Commands / Cell Menu / Cell Properties /

Cell Edit Duplicate

FilledSmallSquare Cell Edit Duplicate causes a new cell to be created whenever the selected cell is edited.

FilledSmallSquare Typically a property of output cells.

FilledSmallSquare This command toggles the option CellEditDuplicate between True and False on the selected cell objects.