@User , I was never able to figure it out. @User, I think you might be miss-understanding what I was asking. The video above and documentation seem to only reference creating a single custom environment. I am talking about inheritance from the various environments. For example, right now, if I run my dev environment, I also inherent from base if dev does not include the save parameter/catalog. I am wanting to take it a step further, where there are three levels of inheritance. Specifically such that temp inherits from dev which inherits from base (base -> dev -> temp).