How to set font size of labels in V2 dashboard

Many thanks jbudd for your help.

It worked very well for the gauges. Now I am trying to use the same approach for the chart. But that does not seem to work. May you got an idea why....

Here's what I tried:

I extended the definition for of the template node for the charts, like this:

Then I tried to find the same part in the explore window like you showed for the gauge. But for the charts there seems to be no "label" definition:

What am I missing?

Many thanks

Heinz