<ul>
<li>Acorn is software which allows you to edit graphic files.</li>
<li>Can you use Spotlight to find and launch Acorn?</li>
<li>Once you have launched Acorn, create a new image sized at 1680 x 1050 <span style="text-decoration: underline;"><strong>pixels</strong></span> with resolution 72 <span style="text-decoration: underline;"><strong>dpi</strong></span>:</li>
</ul>
<p><a style="font-weight: bold;" href="https://gibbon.ichk.edu.hk/uploads/2013/06/Acorn New Image Window_qo6nfntkpfxmtzf.png" target="_blank"><img class="resource" style="max-width: 500px; display: block; margin-left: auto; margin-right: auto;" src="https://gibbon.ichk.edu.hk/uploads/2013/06/Acorn New Image Window_qo6nfntkpfxmtzf.png" alt="" /></a></p>
<ul>
<li>Save your new file as a .acorn image.</li>
</ul>