Changing Referenced Object Attributes


This might be simple to answer but I wasn’t able to find the solution myself… and I am newbie to Grasshopper

I have an algorithm that starts with some referenced objects (surfaces) and ends by baking different geometries to specific Layers.
However, I would also like to change the attributes of the referenced objects, but so far I only managed to create new ones with the attributes I want…

Is there a way to do this? I found something from Elefront that says Modify Rhino Object Attributes, but I can’t figure out how to use it and amazingly I could find a single example or tutorial on this…