Perhaps another basic question about a mysterious disappearance. I am using Blender to edit video, and my F-curves have vanished. The keyframes are still visible and apparently functional in the keyframe editor, and a post on reddit suggests that I might have pushed an action down (?) whatever that means. There is an action (SceneAction.001) visible in the NLA editor, but there is nothing to see in the Action Editor.
Screenshots of the Action Editor, Dope Sheet, and NLA Editor below.
Any pointers would be very much appreciated!