By default, floor plan and section views do not display spaces. You need to make spaces visible. 
-  Click in the floor plan or section view to make it active, and enter VG on the keyboard. 
You can also click View tab
Graphics panel
 Visibility/Graphics. 
  
- On the Model Categories tab of the Visibility Graphics dialog, scroll down to Spaces. 
 
- Expand Spaces, select Interior and Reference (if you want to display reference crosshairs), and click OK. 
 
- Repeat to make spaces visible for all other floor plan and section views in which you want to view spaces.