Using the control panel
Control Panel\All Control Panel Items\Display (partly displayed in the screenshot below), I first changed the DPI from the "Smaller 100%" setting to the "Medium 125%" setting, and after a few days back again to the "Smaller 100%" setting. However, not everything is back to its normal size.
In particular, some applications, e.g. Chrome, now have very small text in some parts, smaller than it was with "Smaller 100%" setting before.
In the screenshot above, the Chrome window in the back is running in a Remote Desktop session, and here the title in the Super User tab is the expected size. Next to it is an instance of Chrome from my desktop, where the title in the Super User tab is clearly smaller.
I have checked the registry and all 'LogPixels' are set to 96, the fix mentioned elsewhere on SU does not seem to apply.
How do I fix this?