autoScale won't grow above 1

I set my diagram to autoScale: go.Diagram.Uniform and it will shrink below 1 but won’t grow above 1. Is there another setting I need to do to make it grow past 1 and always fill the canvas? Tried maxScale but that didn’t work.

This is GoJS 1.5.2 if that matters.

It actually won’t set the scale to a value larger than the CommandHandler.defaultScale. So you could set that to be larger than 1.0.