There are 2 screens on which you can choose to do the actual scheduling - this is one of them
(the other screen is the Priority List Screen, see the Tutorial).
 
You can sit at this Visual Builder Screen and drag-and-drop to 'drive' through the timetable.
 
At first sight it looks very complicated.  To see what each part will do for you, please click on:
www.timetabler.com/kb/UsingtheVisualBuilderScreen.pdf