OS X Mavericks Install

I have installed OS X Mavericks today. I used Lion before installed Mavericks since July 2011. Before installed, there are a lot of library and applications which I tried to test, use only once or twice library so I think that I will re-install with clear my HDD when new Max OS X released.

I tried to re-install, but I could not discover the option to format HDD at first. Mavericks installer has been changed from Lion's one. There is a possible Mountain Lion installer is changed too, but I have no idea because I have never used Mountain Lion.

Installing Mavericks to formatted Disk, you have to format "Macintosh HD" by Disk Utility format option. This is a memo for me because the step has been changed to re-install Mac OS X.