Stack as many video lanes as the edit needs. Any clip becomes a floating overlay with drag-and-resize handles, scaled, placed, rounded and faded as it will export.
True multi-lane compositing
Lane order is draw order: what sits above draws on top. Full-frame clips, floating overlays, keyed subjects and title cards all coexist, and transparent gaps show the lanes (or the project colour) beneath.
What you stack is what exports, through one compositing model
Aspect-true overlay boxes that hug the media
Per-clip opacity, rounded-corner masks and shape crops
Place an overlay on the canvas
The layout editor gives every overlay handles on the canvas: drag to place, resize from a corner, snap to an edge. Add keyframes when the overlay needs to move over time.
Snap presets or free placement, chosen per overlay
Combine with chroma key for floating cutout subjects
The exported composite matches the canvas, pixel for pixel
Questions
How many video layers can I stack?
As many lanes as the edit needs. Lane order is draw order, and you can reorder lanes at any time.
Will my portrait overlay get stretched into a rectangle?
No. Overlay boxes hug the media's own aspect ratio, and reframing is done with the crop tool rather than by distortion.
Can the overlay move over time?
Yes. Keyframe its position, scale and opacity: a fly-in, a push or a fade is a few keys each.
Does the preview match the exported composite?
Yes. Lane order, transforms, masks and opacity are applied the same way in the preview and in the renderer.