To access any of the screens beyond the login screen, a valid login session must be acquired. Acquiring a valid login session will require a valid user ID and password.
Login sessions have a maximum time that they are allowed to exist when idle. When an attempt is made to access a screen after a login session's idle time limit has been exceeded, the login screen will be presented to re-authenticate the user. To access the desired page simply supply your user id and password.
A Logout button is always available on each application screen. The logout button will immediately end your session when pressed, and as a result the application login screen will be presented.
Using your browser's bookmark or "favorites" feature can avoid extra steps when returning to a particular application screen. However, one can expect an intermediate trip through the login screen whenever there is not an active login session.