Various methods of setting single rules (or ``by hand'' selection for a rule mix) are available (see #13.6.1-16). In most cases except filing, they apply equally to setting rules or totalistic codes.
If ``single rule`` was selected in #13.3,
or if ``by hand'' was selected in #13.5.1 (for a rule mix),
or if ``by hand'' was selected in #13.5.7 (for a limited rule-set),
then the following main sequence prompt is displayed (the precise wording is context sensitive and may vary considerably),
Select k=5 rule, empty-e, (default-random) (k=neighbourhood size)
maj-m life-f dec-d random-r bits-b hex-h repeat-p load-l: