Subscript

---
title: Subscript
docs:
  - route: /docs/components/mark-toolbar-button
    title: Mark Toolbar Button
---

<ComponentPreview name="basic-marks-demo" />

<PackageInfo>

## Features

- Format text as subscript for mathematical expressions or chemical formulas
- Keyboard shortcut support for quick formatting
- Renders as `<sub>` HTML element by default

</PackageInfo>

## Kit Usage

<Steps>

### Installation

The fastest way to add the subscript plugin is with the `BasicMarksKit`, which includes pre-configured `SubscriptPlugin` along with other basic marks and their [Plate UI](/docs/installation/plate-ui) components.

<ComponentSource name="basic-marks-kit" />

### Add Kit

Add the kit to your plugins:

```tsx
import { createPlateEditor } from 'platejs/react';
import { BasicMarksKit } from '@/components/editor/plugins/basic-marks-kit';

const editor = createPlateEditor({
  plugins: [
    // ...otherPlugins,
    ...BasicMarksKit,
  ],
});
```

</Steps>

## Manual Usage

<Steps>

### Installation

```bash
npm install @platejs/basic-nodes
```

### Add Plugin

Include `SubscriptPlugin` in your Plate plugins array when creating the editor.

```tsx
import { SubscriptPlugin } from '@platejs/basic-nodes/react';
import { createPlateEditor } from 'platejs/react';

const editor = createPlateEditor({
  plugins: [
    // ...otherPlugins,
    SubscriptPlugin,
  ],
});
```

### Configure Plugin

You can configure the `SubscriptPlugin` with custom keyboard shortcuts.

```tsx
import { SubscriptPlugin } from '@platejs/basic-nodes/react';
import { createPlateEditor } from 'platejs/react';

const editor = createPlateEditor({
  plugins: [
    // ...otherPlugins,
    SubscriptPlugin.configure({
      shortcuts: { toggle: { keys: 'mod+comma' } },
    }),
  ],
});
```

- `shortcuts.toggle`: Defines a keyboard [shortcut](/docs/plugin-shortcuts) to toggle subscript formatting.

### Add Toolbar Button

You can add [`MarkToolbarButton`](/docs/components/mark-toolbar-button) to your [Toolbar](/docs/toolbar) to toggle subscript formatting.

</Steps>

## Plugins

### `SubscriptPlugin`

Plugin for subscript text formatting. Renders as `<sub>` HTML element by default.

## Transforms

### `tf.subscript.toggle`

Toggles the subscript formatting for the selected text.