Studio edits the JSX nodes that create timeline items. Structure the code around
what the user should be able to select, move, trim, or style independently.
Keep editable values inline on each instance.

Before writing a scene or refactoring its layers, read
[editable timeline structure](timeline-structure.md). It covers editing units,
tracks, shared timing, plain layout containers, and a complete component-to-root
example. For a timeline built from footage, also read
editable video timelines.

Use connected compositions when
a scene or reusable group needs its own timeline. Validate both its standalone
view and the full parent timeline; a connection alone does not guarantee fewer
visible rows.

## Choose schema fields

Each key in the schema is a prop that Studio can read and edit at the call site.
Props that are not in the schema still work, but are not editable in Studio.
Keys may use dot notation, such as `style.color`.

| Type                                                                         | Use for                                                      | Keyframable   |
| ---------------------------------------------------------------------------- | ------------------------------------------------------------ | ------------- |
| `string`                                                                     | Strings, such as a title, prompt, or code snippet            | No            |
| `number`                                                                     | Numbers, with optional `min`, `max`, `step`, `integer`       | Yes           |
| `boolean`                                                                    | On/off switches                                              | Yes (hold)    |
| `color`                                                                      | CSS color strings                                            | Yes           |
| `enum`                                                                       | A choice between `variants`, each with its own nested schema | Opt-in (hold) |
| `array`                                                                      | Lists of numbers, colors, enums and more                     | No            |
| `asset`                                                                      | Media sources, with optional `assetType`                     | No            |
| `font-family`                                                                | CSS font family                                              | No            |
| `font-weight`                                                                | Font weight                                                  | Yes           |
| `translate`, `scale`, `rotation-css`, `rotation-degrees`, `transform-origin` | Transforms                                                   | Yes           |
| `uv-coordinate`                                                              | A normalized `[x, y]` point on the element                   | Yes           |
| `svg-path`                                                                   | SVG path data                                                | Yes           |
| `remotion-captions`                                                          | `Caption[]` data                                             | No            |
| `hidden`                                                                     | A value kept out of the controls                             | —             |

Every field needs a `default` and should have a `description`, which Studio shows as the label.
Set `keyframable: false` to show a static control.

Expose content and per-instance appearance, such as the text and an accent color.
Do not add fields for `style.translate`, `style.scale`, `style.rotate`, `style.transformOrigin` and `style.opacity`: `Interactive.create()` adds them automatically.

To make CSS properties of the root editable per instance, spread the built-in schema fragments:

```tsx
const cardSchema = {
  ...Interactive.textSchema, // style.color, style.fontSize, style.fontWeight, ...
  ...Interactive.backgroundSchema, // style.backgroundColor
  ...Interactive.borderRadiusSchema, // style.borderRadius, ...
} as const satisfies InteractivitySchema;
```

Also available: `Interactive.borderSchema`, and `Interactive.captionsSchema` for components that accept captions.
For components that accept `React.ReactNode` children, add `...Interactive.childrenSchema`.
It provides controls for children content and may evolve to support richer content.
Currently, it uses a string field labeled "Text" with a default of `''`.
If a component requires string-only children, declare an explicit `children` field with `type: 'string'` instead.
`Interactive.textSchema` controls typography styles; `childrenSchema` controls content.
The children fragment is not included in `baseSchema` or automatically added to custom components.
Nested markup and computed children are currently read-only.


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