Floors appear as tabs on the map, in order. Upload an image for each floor plan — PNG or JPEG.
Have a single PDF with one page per floor? Upload it here and each page becomes a new floor automatically, in page order. They'll be named "Floor 1", "Floor 2", etc. — rename them above afterward.
Zones are named areas subscribers can pick from when signing up for notifications. Drawing and editing zones happens directly on the map, on whichever floor is currently selected.