The patched NotifyOSD adds the following features to Ubuntu’s default notifications (all are optional of course):
- close on click: the notifications can be configured to close when clicked on;
- themes support: change color, width, height, font size, opacity, icon size and more;
- working timeout option (“-t”);
- change the notification position: top-right, middle-right, bottom-right, bottom-left, middle-left and top-left corners;
- prevent the notification bubbles from fading out when the mouse pointer hovers over them.
Full article here:
Configurable Notification Bubbles For Ubuntu 14.04 LTS (Close On Click, Change Position, Colors, Size And More) (Web Upd8)
Related:
Customize Bubble Notifications as you like in Ubuntu 14.04/13.10/12.10/12.04 (PPA) (NoobsLab)