How to change the Icons for Individual Applications in Ubuntu 12.04. In this Tutorial video I show you how to customise the icon for a specific application, which is ideal if you don't like the default picture in your Icon set. Icons need to be in PNG format, something like 128x128 pixels works fine. You can put them in your /home/pictures folder and sync them with Ubuntu One if you have multiple systems. Or they can be stored in /usr/share/icons if you have multiple users on the same system. Video on How to change Icon sets: https://www.youtube.com/watch?v=0K1XIUvGMPI Wallpaper: http://imgur.com/EwJkn