On xbox 360 how do you change your theme back to the original one?

I just can't seem to figure it out....On xbox 360 how do you change your theme back to the original one?
If you mean the NXE dashboard to the original one, not possible.

If you just mean the visual theme of the dashboard, it should be under Personal Settings from the guide button menu.On xbox 360 how do you change your theme back to the original one?
If you want to go back to the blades, then sorry it cannot be done. TO change a theme you go into settings and it will list themes, there you can select the first one which I believe is called sunny or day.