Anyone? The entire databases layouts have all been completely ruined by this one edit on one layout. There is no way that I can find to reapply the theme correctly.
This may or may not work but worth a shot:
In Edit Layout mode, select the Body. Then in inspector go to the appearance tab. At the top, click on the blue square. If you hover it will say "Apply theme style to one or more objects".
Thanks for the response—I tried this and it changed the background to a completely different design. I tried to see if I could pick up the theme for the body element from a brand new database, but I can't seem to get the style to copy. I've had to just go ahead and redesign the layout's body area, but I would still love to find a solution in case this crops up again.