Inasmuch as the limiting cases in which a higher dimensional automaton approaches one of lower dimension through very short periodicities in one or more directions are important, provision has been made for a ``cube'' of few planes.
The options h, i, j, and k create lookup tables in the CAM/PC appropriate for a cyclic automaton of spatial period 1, 2, 3, or 4, respectively. These tables are distinct from each other and from the one generated by insert, but nevertheless displace it and persist until they themselves are displaced.
Since the run cycle of the full automaton involves shuffling disk files, in the exceptional case of CAMETD there are two ways to initiate an evolution; S and s refer to the full automaton as is the norm in CAMEX , but G and g refer to the four thin cubes which are entirely self contained within the CAM/PC .
The reflexes which one tends to establish while using CAMEX will cause much anguish and vexation if the two activators are confused (pressing S without thinking tends to become habitual). Also, the possibilities inherent in starting an evolution from the main menu after having left the submenu can be either a curse or a blessing, accordingly as the differences in their operation are understood.
Because subtleties of color are such an asset in visualizing the three dimensional automaton, especially given the absence of other clues, the keys f9 and f10, which adjust color and allow CAM -plane viewing, have been brought over into the submenu.
An additional key, f8, has been endowed with similar properties relative to the planes stored in the diskfiles, so that they can ve viewed while the automaton is halted.
Of course, one single plane can always be emphasized, to the exclusion of the rest.