I have a WP blog which is displayed with the default theme. I'm interested in testing other themes to see how they might display my posts and other features. I understand that the files for any selected themes would have to be downloaded to my remote server before they could effectively display my blog, but I have a couple of questions about testing any selected theme. Once the files for a selected theme have been downloaded to my severe, will they be completely applied when the theme is "activated" without me having to make any additional code settings? Will I be able to switch back to my default theme and have it completed applied to my blog without any of its templates being changed in the process? If this process is as complete and as simple as it might be, I will be glad to test out some new themes for my blog. My current blog can be seen at http://christianityetc.org/blog.