Help me friends, you're my only hope!

Does anyone know how to do the Blogger version of an LJ cut who can tell me in a way I understand? Because I definitely do not understand the Blogger help page. I used to have several posts cut with the "read more" link and when I went back to see how they'd been done (Pat did them, that's why I didn't already know how they'd been done; he did them because, as I said, I definitely do not understand the Blogger help page.), I saw that those posts were all now expanded with a useless "read more" link at the bottom. Ugh. Help me! Please!