You can search it from the cross-reference.

Procedure:

1. Go to [Tool] > [Search] > [Cross-reference].
   
    
    
2. Select [Target: Macro Block] and enter a macro block number which you wish to search for.
   Click [Search].
   
   E.g) Search for the macro blocks No.0 to 5.
   
    
   
    
3. By double-clicking a line, you can jump to where it is used.
   
   E.g.) Check where the macro block number 0 is used: