You can simply click on "Prepare to Print" again and it returns to the preview. This works even when there's a print in progress.
NB - This is on Windows, but I assume that Mac version does the same.
Ah, OK. that makes sense. Disappointing but it makes sense.rrdavis wrote:I think you can change it on the LCD of the printer, but you can't use the knob in the machine control panel, since I don't think x3g printers supports those commands over USB.