Yes, but that just scales down the image so it fits in the height/width. The overflow property is for deciding what to do when the content doesn’t fit.
https://developer.mozilla.org/en-US/docs/Web/CSS/overflow
or
https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/overflow
I do understand that it’s a relatively new thing so if it’s not supported, I understand that. Can you confirm one way or the other?
Scaling the viewport is an option we’ve considered, but haven’t implemented as we don’t yet have a good way to figure out on the fly exactly what that size should be, given the different geometries we have to work with.
I did see in another forum post from several years ago that you had provided some unsupported code that would translate an svg to GraphObjects. I would be interested in seeing that code or something equivalient if you still happen to have it.