Monitoring CPU Core Voltage and OSD

Hi.

I can't get Afterburner to show the graph for CPU Voltage in the monitor window. Nor will it show on OSD.

You can view the screenshot here:
https://imgur.com/a/TTyvAAP

I tried to add an attachment but it didn't work. Seems unclear.
1. Choose File = Done.
2. Then what? Add Attachment? = Didn't do anything. 
3. View My Attachments = No attachment

Thanks, Kel