Hi Glenn. Tab sets do have some different layouts worth experimenting with (picklist, left bar tab, right bar tab, etc.) using the "Tab Navigation" setting. Declaratively, they don't have a setting that allows them to be collapsible. However, Barry Schnell, one of our Skuid Champions, has created a custom collapsible wrapper that you can read all about here. It might be used to wrap up your conventional tab set, depending your use case.