When saving a plot through
right click ► Save Graphic As…, Mathematica lets me choose several options, including separate vector representations for areas with transparency and with smooth shading. In particular, in addition to using a rasterized or high-quality vector version, it has an option to "use most compatible vector representation".
How can I do this using
Export? Saving through right click introduces weird glitches in the labels and I want to be able to save the graphics manually, but I end up with either ugly rasterized images or 80-megabyte monstrosities. The "most compatible vector representation" seems to have a great file size to quality ratio.