Good afternoon, I was able to make a tricolor map with Larch's XRFMap_viewer like below, but couldn't have a pie-shaped diagram legend like this displayed like in a lot of XRF publications. Could you give some advice on how to do it? Thank you. 
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Good afternoon,

I was able to make a tricolor map with Larch's XRFMap_viewer like below, 
but couldn't have a pie-shaped diagram legend like this displayed like in a lot of XRF publications. Could you give some advice on how to do it? Thank you.

Best regards,
Tony