I have a collection (“Hammer Horror”) with 38 movies in it.
When I open that collection, Plex Media Player (2.47.0.1035-e74d341b) shows the movies as a one-line sidescrolling list.
It would be more useful to me if they were shown on multiple lines, just like in the library.
(I feel the same way about episodes in TV series, but I suspect that may come with more technical/UI challenges, so I didn’t include it in this feature suggestion.)
