#16 Convex Hull didn't appear

[Cocoa Wu]

Dear Professor,

Hi, I found that CiteSpace couldn't show the "Convex Hull".
I am using the lateste version 5.6.R1. when I clicked "Convex Hull: Show/Hide", there were not any cluster convex hulls. I also tried "Areas: Toggle Fill Color Patterns" and others, notiing happened.

I wonder what's wrong with convex hull.

Looking forward to your reply.

Best,
Cocoa