Going from Spherical Panorama back to flat (original) view

Hi all,

Im a beginner level PS user exploring 360 illustrations. Can anyone tell me how I go from the 3d view

  back to the original flat, full page view?

I read a few of the other threads but couldn't spot anything that addresses my issue.

I know how to leave the 3d Workspace, and how to Resterize the current view on the 3d viewer, but I'm trying to perform edits in the 3d view as well as the Equirectangular view - for my own development as an artist in the medium.

Thank you.