To upgrade a tee to a cross, you must first add cable tray to one side of the tee. 
-  Select the tee you want to upgrade. 
- Right-click the cable tray control and click Draw Cable Tray. 
- Draw a length of cable tray. 
- Press ESC twice. 
- Select the tee again. 
- Click the plus symbol (+) next to the fitting. 
 The tee is changed to a cross.  
- To change the cross back to a tee, click the minus symbol (-) next to the fitting.