The Commands

To start off, open up a new file in which the user-desired scaling factor is defined:

sudo nano /usr/share/glib-2.0/schemas/90_hidpi.gschema.override

Set the scaling factor to the value of 2 (meaning 200%):

[org.gnome.desktop.interface]
scaling-factor=2

Now save your configuration file and exit from your editor.

Apply the changes with the following command:

sudo glib-compile-schemas /usr/share/glib-2.0/schemas

That’s it. Now reboot your computer and enjoy your applied 200% scaling factor.