How do I keep checking for A&E FP+

[abinormal]

I wasn't able to get FP+ for Anna and Elsa on our MK days, so I'm planning to keep trying. But I want to make sure I'm doing it right.

To get our other FPs I had to let it select three. I'm using the one we don't actually want and trying to change it and see if A&E comes up as an option.

Is this the most efficient way to search? Or is there a better way? I don't know if it will show me any availability or just for 3 people.