I am using the TwentyTen theme and WP 3.0. I like that I can select from single or double column layouts on each page. What I really want to do is to set the default (for pages only) to single column instead of double. I don't want to completely remove the option of using double column if I decide to, but I want the default to be single (for editors who will be creating new pages, and won't know to toggle single column). Can anyone help me?