chnging colors on PCA plot

[#1]

Hi,

I seem to be able to change the color of the circle around the PCA plot but not the arrows which remain red no matter what I do. I changed the circle by Right Clicking on the plot --> Customize --> Circle and selecting the black color. I did the same using the option of Customize --> Arrow but nothing changes.

Any advice would be appreciated.

Thanks a lot.

Helga