I would like to change the default desktop backgrounds of newly created activities. I would like to have all backgrounds black.
I succeeded with changing the following file. New activities have now desktops with black background on all three monitors.
But it is now not possible to right click on the desktop to get the menu and because of this it is not possible to change the background on a created activity.
The content of the file looks like this now:
[Desktop] Containment=org.kde.plasma.desktop ToolBox=org.kde.desktoptoolbox RuntimePlatform=Desktop [Desktop][ContainmentActions] RightButton;NoModifier=org.kde.contextmenu MiddleButton;NoModifier=org.kde.paste wheel:Vertical;NoModifier=org.kde.switchdesktop [Panel] Containment=org.kde.panel ToolBox=org.kde.paneltoolbox [Panel][ContainmentActions] RightButton;NoModifier=org.kde.contextmenu [Wallpaper] Plugin=org.kde.color FillMode=2 [Wallpaper/org.kde.color/General] Color=0,0,0