No. The only way to change it is by zooming the page. I advise against any attempts to override it.

Instead I would recommend to provide your own download link, which might be what @fil suggested.

Ideally though Observable would use viewBox to determine the aspect ratio of the SVG, and test for width/height to determine the desired output size.

In my GIF converter notebook, I used the following logic to determine the output size:

```
function getSVGDimensions(svg) {
const {width: vw, height: vh} = svg.viewBox.baseVal,
w = parseVal(svg.width),
h = parseVal(svg.height),
// viewBox aspect ratio.
va = vw > 0 && vh > 0 ? vw / vh : 0,
// SVG aspect ratio.
a = w > 0 && h > 0 ? w / h : 0;
if(va > 0) {
if(a > 0) return a > va ? [h * va, h] : [w, w / va];
if(w > 0) return [w, w / va];
if(h > 0) return [h * va, h];
return [vw, vh];
}
if(a > 0) return [w, h];
if(w > 0) return [w, w];
if(h > 0) return [h, h];
return [SVG_DEFAULT_SIZE, SVG_DEFAULT_SIZE];
function parseVal({baseVal: v}) {
try {
switch(v.unitType) {
case SVGLength.SVG_LENGTHTYPE_NUMBER:
case SVGLength.SVG_LENGTHTYPE_PX:
return v.value;
}
}
catch(e) {}
return 0;
}
}
```