Installing Configuration NotifyOSD
sudo add-apt-repository ppa:leolik/leolik sudo add-apt-repository ppa:amandeepgrewal/notifyosdconfig sudo apt-get update sudo apt-get install notifyosdconfigUsing Configuration NotifyOSD
Launch application from the menu Applications → Accessories → NotifyOSD configuration
Then you can customize the notifications you wish. Tab "Bubble" can change the background notifications playing on opacity, background color and rounded corners. The other tab (Text) allows you to change the style of the title and body of the message
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