Generative Expand and exposing the middle content

I have used the generative expand tool on an image I am working on and I can see from the thumbnails that it appears to have generated content for the middle of the image (on the space occupied by the original canvas) as well as int he expanded areas.  Is there a way that I can expose this content in the middle?  I have tried filling in the clipping mask, disabling the mask, and deleting the mask but nothing seems to reveal this middle area.  does anyone know how to expose the middle?