Use cross-reference.

How to search buttons:

1. Go to [Tool] > [Search] > [Cross-reference].
   
   
   
   
2. [Target: Screen or Overlap Library] and enter the number you wish to search.
   Click [Search].
   
   E.g) Screen change-over buttons that jumps to the screen 1.
   
   
   
   
3. By double-cliking a line, you can jump to where it is used.