I'm going to go out on a limb and assume the OP means CS6 and CS4. If that's the case export from CS6 as IDML and open that in CS4.
Peter's caveats apply here as well.
Bob
I'm going to go out on a limb and assume the OP means CS6 and CS4. If that's the case export from CS6 as IDML and open that in CS4.
Peter's caveats apply here as well.
Bob