About the vBulletin decorating themes...
 

I'm still figuring out how to decorate or rather change the to a new style. I want to be able to do it separately, and not switch my forum until it is ready.

What I need to know is:

1. If there is a way / setting in the admin for users to be able to "choose a theme", so that members can switch if they want? I looked in my UserCP, and couldn't find this. If it exists and if it needs to be activated in the admin, this would be useful for me to develop the new theme, and when it is done, I can set the new one as default, but leave the existing theme in place for those who are familiar or prefer it.

2. How do I find out the name of my current default theme?

Any advice appreciated.

Thanks you very much.

vBulletin Options -> Style & Language Settings -> Allow Users To Change Styles -> Yes
When you are on this page, it'll show the default theme. Your option of themes will be in the bottom-left corner (usually) in the form of a drop-down.