very small fonts and icons on 4k screens

The mentioned bug has been fixed, Eclipse automatically scales images on high-DPI monitors on Windows since Eclipse Neon (4.6). So, make sure your Eclipse IDE is up to date.

If upgrading does not fix your issue, in eclipse.ini add the following line below the line -vmargs (see Tweaking SWT’s auto-scaling):

-Dswt.autoScale=200

(In contrast to the compatibility mode of Windows, this is the way to get the double-resolution icons.)

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