Stories in ArchiCAD, just as in real buildings, serve to divide space vertically and replicate the story structure of your real building. Stories are typically used for drawing each Floor Plan of multistory structures separately.
Each story in the project is displayed, by name and number, in the Navigator’s Project Map. Double-click on the story name to display it in the Floor Plan window. The current Story name appears in the title bar of the Floor Plan Window.
The elevation (or relative base height) of construction elements placed in 2D windows are calculated relative to a chosen Story: either the element’s defined Home Story, or the current story. (See the Base Height setting in the Settings dialog box of construction elements, as in the following image.)