Scenes

Inputs stacked as layers.

Edit

Add one from Scenes. Edit chooses the Inputs, plus position, size, opacity, and order.
Audio Follow on a layer ties that Input’s sound to the picture.

Where it goes

Use it on a Mixing Unit bus, as an Overlay source, on a Multiview tile, or as an Output source.

Tags and tiles

A Scene can have more than one tag. Tabs above the list switch All and each tag.
Right-click the name bar to collapse the preview and cut thumb load. When collapsed, click selects Preview and double-click opens settings.

Scene-list and switcher thumbs are GPU readbacks. Adding scenes does not use the video output destination window limit. Only the live Preview/Program buses take those slots.