I'm using the Twenty-Ten theme on my own host/server, and there's a template for one column with no sidebar (onecolumn-page.php is the file). In the WordPress instructions, it says to "just choose the “One column, no sidebar” template" with no further explanation:
My wordpress user interface looks like this (with the template I want circled):
So, where is it that I just "choose" which template I want to use, as wordpress.org says?
(I've already tried copying and pasting the code from the onecolumn-page.php file into the index.php file...and yes, it does become one column, but I lose the ability for people to make comments or access the post as a single page.)