I suggest in the left-hand column above Metadata, you can add information about what is being displayed:
Exactly what the text should be will probably become clear once you've implemented the grouping, since there's the notion of what's grouped onto a thumbnail and what's grouped into a "group of thumbnails" as shown in the list.
INSTANCES [GROUPED BY] FRAME
TRACKS
Don't know what to call the temporal segmenting thing.
I suggest in the left-hand column above Metadata, you can add information about what is being displayed:
Exactly what the text should be will probably become clear once you've implemented the grouping, since there's the notion of what's grouped onto a thumbnail and what's grouped into a "group of thumbnails" as shown in the list.
INSTANCES [GROUPED BY] FRAME TRACKS
Don't know what to call the temporal segmenting thing.