Adds a dock where you can store scenes for quick access. The scenes are organized into tabs. Drag and drop the scene to slot to assign it and then you can drag and drop from the dock onto your level scene.
The plugin generates a preview for each scene in dock using a viewport. It only supports 2D scene previews, but you can drop a texture on an occupied slot to assign a custom icon. Right-click a slot to access it's context menu.
Check the repo for more info and GIFs.