I have been trying to reverse the axis of the ternary plot for hours using GMT 5.4. Currently, the bottom axis is 0 to 100, but I want to change it to 100 to 0 and alter other axes accordingly. That’s what people normally use in soil science. In basemap, I can reverse the axis by setting -J to minus, but it doesn’t work in psternary. Can somebody give me a hand? Thank you!