I have not seen how show time assignments work.
Unlike other
DAS Return Times, the ones for shows had a beginning and an end time. That was because they were for a specific show time. They need to do that so there are not more guests assigned to that show for Fastpass Plus and DAS than there are seats available.
With paper DAS, guests were able to choose which show time they wanted. We were generally told the next show and asked if that would work for us.
With choosing times for Fastpass Plus, the system chooses one (? the next showtime that is available and works with the Fastpasses the guest already has?).
That is the 'suggestion' for the Fastpass Plus, but it is possible to look for a different time for the show.
My best guess is that DAS Return Times will work the same way, with a default suggestion as a kind of 'starting point' that can be changed.