storybook/docs/_snippets/storybook-preview-custom-canvas.md

import { MyCanvas } from './MyCanvas';

export default {
  parameters: {
    docs: {
      components: {
        Canvas: MyCanvas,
      },
    },
  },
};

// Replace your-framework with the framework you are using (e.g., react, vue3)
import { Preview } from '@storybook/your-framework';

import { MyCanvas } from './MyCanvas';

const preview: Preview = {
  parameters: {
    docs: {
      components: {
        Canvas: MyCanvas,
      },
    },
  },
};

export default preview;