Ever since the time I started to fiddle with GNU/Linux Ubuntu 8.04 in October 2008 at http://infi-nity.com, I had been wondering as to how I could reduce the opacity of the windows. The only program that I could manage to reduce its opacity was Gnome Terminal. Even that was not the whole program but only the console area since the option was offered in its current profile setting. Since the KDE 4 in my Slackware 10.2 can make a whole window transparent, I thought Compiz should be able to. But, I didn't bother to find it out except to look at some menus that I expected to contain such an option. Just now, serendipitiously I pressed ALT and scrolled my mouse wheel down. I was very surprised to see that the active window became transparent. Googling for `compiz window transparent' returned some cool sites describing this behaviour and giving information that compizconfig-settings-manager has to be installed to provide a total control over compiz. I guess I was not in the habit of harnessing an Internet search engine.