MDG-F Replication Timing

I am confused by the parameters (options) used in Edition and Change Request.

During Edition creation, there are three options we can pick and use to control as to when we want replication to occur.

option 1 - Manaully started after release of Edition

option 2 - On final approval of change request.

option 3 - Selected in each change request

However, during Change Request creation, it has only two option 1 and 2. Option 3 is not included there.

Then my question is - What option MDG-F will really go if I choose option 2 in Edition and choose option 1 in Change Request?

Would there be any document that shows the difference across these 3 options and configuration steps of each option?

Thanks, 

LUO