FP+ and changed park hours

[ColoradoDis]

OK - at 60 days out, we made our FP+ arrangements. Now a couple of the parks are opening an hour earlier. I'd like to see if I can change my FP+ times, but want to make sure that I won't lose my current reservation. I assume I'll need to go into the site and change my reservation. What if I don't like any of the options available to me now - can I keep the ones I have?

Thanks so much for your help.

 

[soniam]

There's a cancel option that keeps things from changing. However, you won't be given the option of any times that overlap with your current FP+. Also, sometimes it doesn't give options that are close to your current time. By close, I have seen 30 minutes different not shown.