The user and consultant share images . The use case ends when the user closes his video conference window. At step 1 if the user is not logged in the system asks the user to login and the use case terminates. This use case starts when a new user wants to register with Smalltalk Central. The use case begins when an unregistered user tries to access any of the facilities offered by Smalltalk Central eg. editing.
Actor involved is the New user.
By choosing the sign-up option, the new user goes to the signup page on the wiki. The system asks the user to fill up the form. The user has to give a desired login name and password which has to be verified by him. When the user submits the form, the system accepts his login and password and stores the information on the server. The use case ends when the login and password are accepted by the system.