A GNOME Shell extension allowing the user to set the position of the OSD windows for sound or luminosity.
The better option is to install it from https://extensions.gnome.org/
How to manually install the extension ?
Download files and put them in an move-osd-windows@maestroschan.fr
folder to ~/.local/share/gnome-shell/extensions/
You may need to restart the gnome shell environnment ("logout and login again", or alt+f2 + r + enter).