Multiple graphs on a one Habpanel chart widget -- how?

Tags: #<Tag:0x00007f43486ba8b8> #<Tag:0x00007f43486ba7c8>
  • Platform information:
    • Hardware: RPi4/4/250
    • OS: Raspbian Buster
    • Java Runtime Environment: zulu 1.8.0_222
    • openHAB version: 2.4.0-1 Release build
  • Issue of the topic: Can’t find a way to display multiple graphs on a one chart

In the manual Designing dashboard interfaces with HABPanel | openHAB 2 I see that several graphs could be shown on the same widget:
from_manual

How do I do that? In my instance it’s just a combobox, no way to select multiple sources:
from_panel

I have the same query, but in OH3… Did the multi-chart functionality get moved? or removed? (I did have it working in OH2, but have lost that config for the moment due to an SD card failure)