How to scale display in Lubuntu up 150% or 200%?

In Lubuntu 21.10, I had to go through the following steps:

  1. Open LXQt Configuration Center -> Session Settings -> Environment Variables (Advanced) or run lxqt-config-session
  2. Add QT_SCALE_FACTOR with value 2
  3. Add GDK_DPI_SCALE with value 2
  4. Add XCURSOR_SIZE with value 64

Screenshot of LXQt Session Settings showing the three additional environment variables

  1. Open LXQt Configuration Center -> Appearance -> Font and set Resolution (DPI) to 192

enter image description here

  • Discussion: https://github.com/lxqt/lxqt/discussions/2054
  • Feature request: https://github.com/lxqt/lxqt/issues/2173