Octopus Select solution on pareto front

Hi all

I dont undestand how use “explicit components” embedded on Octopus.
I would like to find a way to select each solution on the pareto front on the grasshooper interface and not on the Octopus graph (via reinstate solution)
I try to use the “cull pareto front” component to do that, but i dont really understand how its works

Do you have an idea about that ?

Also do you know a tutorial that explains the use of each Octopus component ?