It's great that we've adopted the convention of adding new events as a top layer in the timeline. Now that we have media clips as events, this isn't always the best UX solution. Pretty much every time I add a new media clip to the timeline, I don't want it as the top layer because it covers up all the existing events that are supposed to happen on top of it, so I have to try and drag it down and place it underneath everything. I propose that we try to adopt the convention that media clips create a new layer, but that new layer is underneath any existing events that are not media clips.
Adding k88 for UI thinking to determine if / what we want to do. Resolving as WONTFIX is a valid response!
Popcorn Maker is no longer under active development. https://learning.mozilla.org/blog/product-update-for-appmaker-and-popcorn-maker