-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=8085 to Worker's JVM arguments
in Configuration > Setup > Worker.
Make sure that the specified TCP port is not used by any other program.
In Designer, open the debug configuration: Run > Debug Configurations.... In the left pane, right click the Remote Java Application item and select New.
Enter host and port (8085).
Run the graph with Run > Debug.
The graph will run and stop on a breakpoint in the same way as in a Local project.