Method _create_mark

tables/file.py:2385–2386

(self, trans: TransactionG, mid: int)

        )

    def _create_mark(self, trans: TransactionG, mid: int) -> MarkG:
        return MarkG(trans, _mark_name % mid, "Mark number %d" % mid, new=True)

    def enable_undo(self, filters: Filters = Filters(complevel=1)) -> None:
        """Enable the Undo/Redo mechanism.