Note this is about a future release of APEX and the final release may differ from what I describe.
Last month I gave two talks at the NL.OUG APEX World conference. The first was part of the APEX 18.1 new features presentation with Anthony and Shakeeb. There I showed an app that demonstrated new region features. I said I would make the app available. Now that apex.oracle.com has been upgraded to 18.1 pre-release you have somewhere to try it out. You can download New Region Features (18.1). Note: You must install the Sample Interactive Grids app and Sample Charts app first because it uses sample data from those apps.