I've put quite a bit of time into townsendpdx.com, utilizing the Twenty Ten Theme. I would like to try a Flexible Width Theme (such as Coraline or Twenty Eleven) to achieve a wider page with less "wasted" space. When I contemplate switching Themes, I have Previewed my site in Twenty Eleven. This seems to default to a one column display. I know I can configure Twenty Eleven to two columns (as I have Twenty Ten), and my finger hovered over "Activate", but I have chickened out. What if it doesn't work out for some reason? Could I transition back to Twenty Ten without messing up a lot of work?
The blog I need help with is townsendpdx.com.