Is there an easy way to create a composite graph from individual .svg graphs? My application generates several (up to 20) full-screen graphs, which are displayed as tabs in a web browser. One of my users would like to see all of the graphs displayed as a grid of miniatures, in addition to the tabbed versions.

Any thoughts?

Whilst not being 100% sure of what you mean by "composite", it sounds a lot like this HOWTO document could be useful to you:

https://www.rgraph.net/canvas/howto-space.html

It uses canvas charts but you could convert it SVG without too much trouble.

Or if you want tabs you can put the charts in <div> tags and hide or show the tags with CSS.

Is this the sort of thing that you meant?

Yes, this is exactly what I was looking for. Thanks.