[kjhughes]

Thank you for the explanation (and for the cool visualization, btw).

It seems that preserveAspectRatio is an important part of understanding viewBox. IMO, it deserves a spot on the telescope's controls. I think a value of `none` might be the best starting point; all of the settings that result in combined scaling and displacement are less intuitive and likely harder to understand at first exposure.

Aside: Even if you decide to keep `xMidYMid ` as the default value for preserveAspectRatio, it seems that you ought to list it explicitly if you wish to specify a meetOrSlice value as Chrome is currently complaining with your existing preserveAspectRatio="meet":

  react-dom.production.min.js:978 Error: <svg> attribute preserveAspectRatio: Unrecognized enumerated value, "meet".