The Class / Course Viewer is not an essential part of creating a schedule in the sense that you do not need to use it to create a schedule but it has some features that will help in creating better schedules. To open the class / course schedule viewer select View > Class / Course Schedule Viewer... from the main menu or click on the appropriate toolbar button. The viewer should look something like the image below.
On the right is a list of all the courses in the current schedule and on the left is a weekly schedule with the timeslot layout. There is a menu at the top with a few options that we will discuss later. If you click on a course on the right the timeslot display will show all of the locations during the week where that course is being taught. So in the example below Math 100 is currently in the green timeslot regions.
If there are overlapping classes the program will highlight them in red. So in the example below Math 155 is in all of the colored timeslots and the overlap is in the red regions.
In the Overlap Marks menu (in the main menu) you can select to track up to 6 overlaps. So if we set this option to 4 overlap marks we get the following. Since there are three distinct colors and no red we know that there are overlaps of at most three classes. So if you have a constraint on your schedule that you can not have more than three of the same course meeting at the same time this would tell you that Math 155 is fine. In general, the red means that there are the maximum number of overlaps you are tracking or more in that region.
You can also select more than one course in the course list. This will combine all of the sections of the selected courses, So in the example below we have selected all of the 400 level mathematics courses and by the display we see that there are no overlaps. So we know that our seniors will not have scheduling problems with the mathematics courses.
Under the view menu you can select to view courses (as above) or individual courses (shown below). You should not be concerned with overlap here since the program will automatically check for schedule conflicts but it may show an undesirable scheduling situation, like a lab meeting far from a course time.