How do I change the password options on my Yahoo email page? It just opens my email up without a password?

I have tried clearing cookies and temporary internet files.
How do I change the password options on my Yahoo email page? It just opens my email up without a password?
If you haven't signed out of your mail try that. Then go back to it and you should have to sign back in. When you sign back in uncheck the "Keep Me Signed In For 2 Weeks".