When logged into the application, you can click on the Logout link which is a submenu under your username to log out as shown below:
Tip
Session timeout can be controlled by the administrator of the account. To change it, administrator of the account can go to Administration menu -> Account Preferences submenu - > Timeouts tab and change the Session Timeout value. The current default for session timeout is 1 hour and negative value means session never expires. User can choose any other positive value based on projects' needs. Once a new value is set, it will be active after the user logs out and logs back in.