storybook/docs/snippets/web-components/storybook-component-layout-param.ts.mdx

```ts
// Button.stories.ts

import type { Meta } from '@storybook/web-components';

const meta: Meta = {
  component: 'demo-button',
  // Sets the layout parameter component wide.
  parameters: {
    layout: 'centered',
  },
};

export default meta;
```