A friend of mine has a 3 column stylesheet blog. In the left hand column there is a list of the posts she's made. In the center tho, there's never more than one post visible at a time. You need to click on one of the titles in the left hand column to call up that post. I'm not certain whether there's a certain number of post titles allowed or if it changes after a certain time limit or not, but I'm trying to figure out whether this function is something that happens automatically with WordPress or you need to install a plugin or modify a file in order to make it happen.
I put up a post yesterday then did a test post today to see if it removed yesterdays post - it didn't. Can anyone help here?