Vortex Sound Research

Hello! I'm still pretty green and unfamiliar with a lot of the terminology that would be useful for me to Google this myself. I've collected enough synths to where I'm going to need a mixer. I mostly want to do live jams. I was hoping there would be a function where you can isolate a part to only hear it on headphones so that I can edit the part before it's audible through the speakers. Does this exist? If so, what would you call this function?