If ``h'' is selected in #13.5.1 above, the method of rule selection is first set with prompt #13.6 below. The various methods of ``by hand'' selection are described in #13.6 and #13.7-13). The rule at each cell index is set, starting from cell 0. A reminder keeps track of the cell index and selection method, and it is possible to jump to another cell index or change the selection method during the procedure.