Hello, I just switched back to atahualpa from Twenty Ten and Eleven. I am starting over, because of problems with other themes. The options are overwhelming. But to start with, now I find the default setting allows public to access my dashboard and to edit my posts. How do I fix this? Thank you for your help.

Take a look at the site while logged out. Do you see the tabs?

Now go look at your user and read the options.

Juggledad,
Thank you for your prompt reply, and you were right. I'm glad it was so simple. As I go on to customize my site, I will probably be back with more difficult questions (for me, at least.)
Thanks again for your help.