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

On Windows 10, if you got hit by the Creators Update:

The Windows 10 Creators Update apparently removed the ability to "Change only the text size" in "Display settings". In addition the update reset my previous text size setting so that I ended up with small font size in the tree items of the package explorer.

A solution that worked for me is to use a small tool 'A+ System Font Size Changer'. There, increasing the "Message box" setting to 4 (a custom unit defined by the tool) and applying the setting changed the font size in the items of the package explorer.

The tool also allows you to increase the size of "Menu", "Title bar", "Palette title", "Icon" (which worked wonders on the display of folders in windows explorer), and "Tooltip".

P.S.: I would have preferred to comment on the answer from Hartmut, but my reputation score is too low.