Choose an intervention method to be applied on the current step.
The interveners build a new step just after the reference step to carry the stand resulting of the intervention.
It is possible to restrict the intervention to a certain group of individuals. Just check the group option and choose a group in the list (ex: restrict to a given species). If some interveners are not compatible with the group restriction device then they will be removed of the list.
Interveners are grouped by types. Choose first the type of intervention: the interveners of the chosen type appear in the selection list.
When an intervener is selected, you can see its description. To open the tool, hit the Ok button.