A plugin for Godot 4: Easily drag and drop nodes into a scene from a palette.
Download Scene Palette from AssetLib in the Godot editor or from https://godotengine.org/asset-library/asset/3074
The Scene Palette Plugin is essentially an alternative file browser with tiled thumbnails, making it easier to see all your scenes at once.
Dragging and dropping scenes from the Scene Palette induces the same behavior
as dragging and dropping .tscn files from the file browser, so you can take
advantage of the same keyboard shortcuts, such as holding ctrl when dropping
a file to add it as a child of the currently selected node.
Using the file browser on top, navigate to the folder containing scenes for your palette. The plugin will create a palette automatically using the scenes in this folder. Nested folders are also allowed.
Press the heart button next to the file selector to save this directory to your favorites. You can change the colors of your favorite palettes to diferrentiate them and saved palettes will persist when closing and reopening the editor.
If you are working on a 2D project, you can instantiate the actual scenes to display in the palette thumbnails to get a crisp image, or you can use the editor's built-in previews (default). These previews come from a snapshot of the scene in the editor window from the last time you saved the scene. If you are using editor previews and no preview shows up, open the scene with the the button on the top right of the thumbnail, center the image and save it again. You may need to re-open the folder in the plugin, but this should update the thumbnails.
Feel free to submit an issue or PR for small feature requests.