When working with intelligent cleanup for T intersections, the following rules apply: 
- T-cleanup works by specifying a boundary wall segment for selected wall segments. 
- The wall segments can be any distance apart, as long as they have a possible intersection. 
- When an improper cleanup condition occurs, a tip displays to suggest possible solutions. 
- Wall segments clean up when their respective wall justification lines intersect cleanly with each other. 
- T-cleanup works for multiple wall intersections, but only one wall segment may be specified for the boundary. 
- Select the wall segments to include in the wall cleanup. 
- Click   . .  
- Select a boundary for T-cleanup.  
T-cleanup works the same way for arc wall segments.