title: Keep original size when export image from illustrator
body: <p>I use Illustrator to export <code>.png</code> files for my app, but when I select medium(<code>150dpi</code>) and high(<code>300dpi</code>) resolution in the PNG options box, it exports in a bigger dimension than my artboard( my artboard  is <code>48px x 48px</code> and the results are <code>56px x 53px</code> and <code>112px x 87px</code>). How can I save my images with artboard size?</p>