The Workspace tab in the Build view should contain the sections you want the system to use to build your master schedule.
To fill the workspace with sections:
- Create sections based on the course schedule attributes you specify, by initializing sections.
- You can copy sections from an existing schedule.
- Determine teacher assignments and create sections at the same time.
After you fill the Workspace with sections, you 
 can pre-schedule sections and pre-define information for those sections 
 before you build
