How do I log in as a different user when there isn't a login link on the front page? I created a user with limited rights and logged in as that user.

Now I have discovered that I have not placed a login module on the front page.

How do I log back in as administrator?
Click logout - usually in the top right corner (but may vary depending on theme); /user/logout is the address.

Then log back in (from /user) with your administrator credentials.