Hi,
I'm confused. By looking at your tutorial (which is very informative) I don't understand why the top row is the "output" and the lower row is the "input". If I create an input node and then right click it, I get all the elements listed on the top row plus some others. Also, if I create an output node and then get their different properties, I get what is listed in the bottom row.
I hope I'm explaining myself.
Thank you.