Welcome Jerry1980 -
Sorry no one else has jumped in with an answer, as yet. IIRC, only one of the Forum members had really checked out the original version of the Trio, and I'm not sure they bought one?
Looking over the product page at Digitech, it seems like you should be able to switch freely among 5 parts; it also seems that there is a Part Sequencer, which may be what you need to manage switching back-and-forth between parts?
My best suggestion is that you email Digitech directly with your question, explaining exactly what you want to be able to do. I have always gotten stellar support from the folks at Digitech, even for legacy products, so I would think that they still have good support for current products, too.