Hello, I hope I am reaching the appropriate channel for asking question. I am a newbie with R and pmg. I am trying to create two gdroplist as the following: First list: West, South, North, East, MidWest Second list: States in the U.S For example, if on the first gdroplist I select value MidWest, then I would like the second gdroplist automatically populated with state that belong in the category of MidWest for further selection. Is this possible with pmg in R? I've tried reading all available manual and examples, but could not find similar case. Thank you, Ferry [[alternative HTML version deleted]]