Hello and welcome to planDisney, Pamela.
Oftentimes when I am planning my Walt Disney World I shift things around too based on dining reservations and park hours. That's why I am so glad
park pass reservations aren't set in stone. You are absolutely able to change your park pass reservations around as long as there is theme park availability. You aren't actually able to modify your existing park pass reservations but you are able to cancel your existing reservations and make all new selections.
The first thing I recommend before doing any switching around is to check the
Walt Disney World Theme Park availability calendar to see if there is availability at the parks you'd like to switch around to. The calendar is broken down into three categories - Guests with a resort stay, Guests with tickets only and Annual Passholders. Be sure you are looking at the calendar that most pertains to you because they all do have different availability. If you are certain that the theme parks that you are wanting to switch around to have availability then you can go ahead and make the swap. What you'll need to do is log in to your
MyDisneyExperience account and scroll down until you see the "My Plans" section. There you will see your park pass reservations each day and the option to "View Details". You'll want to select that and then the option to "Cancel Park Pass Reservations". Once your park pass reservation is canceled, you can then go to the park pass reservation website and start the process to make a new selection. You'll choose your travel party, the date on the calendar and then the theme park. If all goes well, you'll be taken to a confirmation page and have the option to make more park pass reservations. You'll need to repeat this process for every day that you'd like to change around.
I know this probably seems like a lot of steps but it's a fairly easy process. Check the calendar, cancel old park pass reservations and then make new ones in that order. If you have any trouble or have other questions, please feel free to stop back by and
ask me. I'm here to help.
Have a great day and happy planning!