>read grid y</code></font>' sets `<font color="#82140F"><code>\.return_value</code></font>' to `<font color="#82140F"><code>N rows</code></font>'
<p>
`<font color="#82140F"><code>read grid data</code></font>' sets `<font color="#82140F"><code>\.return_value</code></font>' to `<font color="#82140F"><code>N rows N cols</code></font>'
<p>

<!-- @node   Read Image Colorscale, Read Image Grayscale, Read Grid, Read -->
<a name="ReadImageColorscale" ></a>
<h4>9.3.33.4: `<font color="#82140F"><code>read image color