I\'m referring to this Nimbus reference.
I tried to set global Font to be slightly larger:
UIManager.put(\"defaultFont\", new Font(Font.SANS_SERIF,
The answer in a single line of code (assuming you have already set Nimbus LaF):
UIManager.getLookAndFeelDefaults().put("defaultFont", new Font(Font.SANS_SERIF, 0, 20));
Of course, you need to call this before you create any GUI components, i.e. right in your main just after setting Nimbus LaF.