I've defined svg on the CSS page like this:
svg {height: 100%; width: 100%;}
But still nothing.
The cover image page looks like this:
(Anonymized)
<body>
<div>
<svg:svg viewBox="0 0 600 900">
<svg:image xlink:href="../images/xxxxx.jpg" transform="translate(0 0)" width="600" height="900"/>
</svg:svg>
</div>
</body>
I'm still dumbfounded as to why the alteration of ANY of these numbers won't affect the size of the image.