[DiapDealer]

Originally Posted by JSWolf

QT_ENABLE_HIGHDPI_SCALING=0

Here's how to set environment variables in Windows.
https://www.computerhope.com/issues/ch000549.htm

Or, once again, instead of throwing the baby out with the bathwater, you could actually set the environment variable that will force Qt6 to round fractional scaling settings the way Qt5 did by default by using:

QT_SCALE_FACTOR_ROUNDING_POLICY=Round

instead.