Within the Organizer Activity, you switch the view from Day, Month or Year view to the Week View, by selecting the Week View button shown in area (1) below.

Week View
The Week view displays a 7 Day Layout with the Starting day and week number displayed at the top of the view (2). The Week view displays each day as a rectangular area with the Date (3). The current Day is highlighted (4), and you can move through the week view using the arrow keys, PgUp, PgDn keys.
All day events are shown with a rectangular frame (5), and other user events are shown in time order with event times (6). You can turn event times on or off as part of the User Preferences, discussed in (User Preferences | Organizer).
Move the mouse over an event description, and use the left click button to edit the description as in (7). Double-click over an event description to edit the event using the Event window. Use the right hand button on the mouse over a day or event to display the pop-up menu of options for the week view.
Further reading from Week View: