How to reduce a tooltip font size in JBossTools because it's too big while I prefer a smaller? Where are those options in settings?

How to reduce a tooltip font size in JBossTools because it's too big while I prefer a smaller? Where are those options in settings?

Go to Window -> Preferences, then under General -> Appearance -> Colors and Fonts and then under Java you can find "Javadoc display font".
Tip: use filters (marked red on the picture) to find something in preferences - they're really useful.