How can I configure the font size for the tree item in the package explorer in Eclipse?

Question

How can I configure the font size for the tree item in the package explorer/outline in Eclipse?

Which item in Font under Preferences I should change?

Answer 1

FYI:

From Eclipse v4.4 (Luna):

It looks like the CSS files are no longer in the old folder:

eclipse/plugins/org.eclipse.platform_4.x.x.vy/css

They are moved to the new folder:

 eclipse/plugins/org.eclipse.ui.themes_x.x.x.vxxxxx/css

And you must select a theme to apply it, in the menu

Windows → Preferences → General → Appearance