You can alter <presto-meta> elements with a chartstheme name to change the assigned charts theme. The charts theme provides a global layout configuration for all charts that are included in a basic app.

In the following example the ocean charts theme ist assigned:

By defaultMashZone NextGenprovides the carbon, fint, ocean and zune charts themes.

See also Chart styling (default themes and custom themes) in Edit App Properties/Themes.