To highlight master nodes in a model that contains master/slave joints, use the following procedure.

1. Either:

   on the View ribbon tab, select the Label Settings tool in the Labels group
   
   

   or

   in the view window, right-click and select Labels from the pop-up menu

   The Diagrams dialog opens to the Labels tab.
2. Check the option from Master Slave in the General group.
3. Click Apply.
   Tip: Press <Shift+L> to highlight master nodes quickly.
   The master nodes are highlighted with green cubes.
4. Click OK.