freesewing/markdown/dev/reference/plugins/scalebox/en.md

***

## title: scalebox

[![Build-time plugin](https://img.shields.io/badge/Type-build--time-purple.svg)](/plugins)
 
[![License: MIT](https://img.shields.io/npm/l/@freesewing/plugin-scalebox.svg?label=License)](https://www.npmjs.com/package/@freesewing/plugin-scalebox)
 
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[![Open issues tagged pkg:plugin-scalebox](https://img.shields.io/github/issues/freesewing/freesewing/pkg:plugin-scalebox.svg?label=Issues)](https://github.com/freesewing/freesewing/issues?q=is%3Aissue+is%3Aopen+label%3Apkg%3Aplugin-scalebox)

The **scalebox** plugin provides [the scalebox macro](/reference/macros/scalebox/):

<Example part="plugin_scalebox" caption="An example of the scalebox" design={false} />

```js
let { Point, points, macro } = part.shorthand();

points.anchor = new Point(0, 0);

macro("scalebox", {
  at: points.anchor
});
```

<Note>

###### Purpose of a scale box

A scalebox allows people to verify the pattern is printed at the correct scale

</Note>

<Tip>

The scalebox plugin is part of our [plugin-bundle](/reference/plugins/bundle)

</Tip>

## Installation

```bash
npm install @freesewing/plugin-scalebox
```

## Usage

Like all [build-time plugins](/guides/plugins/#build-time-plugins), you load them
by passing them to the [`freesewing.Design`](/reference/api#design) constructor:

```js
import freesewing from "@freesewing/core";
import scalebox from "@freesewing/plugin-scalebox";
import config from "../config";

const Pattern = new freesewing.Design(config, scalebox);
```

Now you can use [the scalebox macro](/reference/macros/scalebox/) the macro in your parts.