Hey all, I'm having some troubles with creating a split level. 
I'm following the guide via, http://www.homedesignersoftware.com/support/article/KB-00932/ 
  
Then I get to step 4. 
Select the wall and click the Open Object  edit button.  On the Roof panel of the Wall Specification dialog:   
Check the box beside Lower wall type if split by butting roof.  
Then, select an interior wall type that is structurally similar to your exterior wall from the drop-down list and click OK.    
For example, if your exterior wall type is "Siding-6", select "Interior-6" from the drop-down list.
  
I cannot seem to find the 'Lower wall type if split by butting roof' option, 
I'm currently running X6 Suite, 
  
Any help would be appreciative, 
Thank you!