Augment the "font-size" value for labels in diagrams

Elastic Stack Kibana
1

the needed feature:

Please can Someone provide me with a Plugin or solution to configure the font-size labels for the diagrams.

a specific use case for the feature:

The labels on the X, Y axes look very small, and I need to increase the "font-size" value in the commons.style.css , I'm struggling following the CONTRIBUTING.md to change the code and rebuild Kibana and I can't find a clear guidline how to do it.

.label-text {
  font-size: 200%;
  font-weight: normal;
}
2

The source for that selector is at https://github.com/elastic/kibana/blob/master/src/ui/public/vislib/styles/_layout.less#L259, and it will get compiled into common.style.css when the server starts next.

How to apply custom css in Kibana UI has an example of a plugin that modifies css that can be used as a reference if you want to go that route.