hello - new to zen cart here, please be kind...

Loaded the Simply Karin template this week with latest version of zencart. I have been working my way around and for the life of me I cannot find a way for a customer that logs in or creates a new account to log out before they finalize a purchase if they so choose to do.

Am I missing something here or is the customer forced to either purchase something to log out or just close their browser leaving their acct open.

I have attempted to find this answer everywhere but it seems to be a great secret. PLEASE help me! Thanks!