Quite a few speakers at JavaOne 2016 will be using NetBeans IDE for demos during their sessions. Excellent. Less excellent is the yelling that will befall you when your audience wants your font to be bigger.
So. BEFORE your session, make sure you're comfortable with the "Zoom Text" keyboard shortcuts, which are set as following by default:
Under pressure, I'm not so great with the mousewheel on my keyboard and so I have remapped the "Zoom Text" keyboard shortcuts as follows, i.e., to Ctrl+PAGE_UP and Ctrl+PAGE_DOWN. (These do override existing keyboard shortcuts, which I never use anyway, i.e., tabbing left and right, I think.)
That's much better and now I have full control over the font size in all the editors in NetBeans IDE via two handy keyboard shortcuts.