The output function makes it possible to process the activation before an output occurs. The unusual name is for historical reasons. All changes in the definition of the f-type consequently affect also all units of that type. Therefore a variety of changes becomes possible with minimum effort. These positions consist of 3 integer coordinates in a 3D grid.
Every unit is assigned to a subnet.
With the use of this variable, structured nets can be displayed more clearly than would otherwise be possible in a 2D presentation. Layers can be displayed selectively. This technique is similar to a presentation with several transparencies, where each transparency contains one aspect or part of the picture, and some or all transparencies can be selected to be stacked on top of each other in a random order. This way portions of the network can be selected to be displayed alone. It is also possible to assign one unit to multiple layers.