All three put your tracked subjects and behaviors in the same screen as the preview. They differ in where things live.
Scene tree left (subjects + nested behaviors), big preview center, inspector right. Tree shows hierarchy at a glance; clicking a behavior swaps inspector contents.
Strength: Clear hierarchy, scales to many subjects. Weakness: Tree-style nav feels technical.
Big preview left, right rail stacks Layers (flat list of subject+behavior combos) and Properties of the selected one. No tree — each row is one effect on one subject.
Strength: Familiar to creators from AE/CapCut. Flat = no nesting confusion. Weakness: Many behaviors on one subject get visually noisy.
Preview dominates. Bottom dock shows horizontal "subject → behavior" chips like a sentence. Right rail is purely properties of whatever's selected. Direct: click the subject in the preview to select it.
Strength: Subjects feel tangible — you click them in the preview. Casual, modern. Weakness: Less efficient for complex stacks; bottom dock scrolls horizontally.
Click a card to select. You can also tell me in the terminal if you want a hybrid.