When exporting PCoA plots, neither PNG nor SVG+lables option seem to include labels in the exported file. Is there a way to have both the plot and the labels in one file?
Or even a way for exporting labels separately similar to taxa bar plots plugin.
Nope, there is no way to do all of this in Emperor.
I think most people export from Emperor, then add labels and annotations using an image editing program. This gives you lots of flexibility on the labels you add!