Manually adjust and fine-tune student schedules only if you are certain that the master schedule will not change and that student schedules are correct.
Running a load will cause manual modifications to be lost. Instead, choose the Reschedule the selected [x] students option when loading.
You can also manually enroll students in courses based on their course requests.
If you use the Balance Adjustment constraint to pre-load a section with a certain number of "placeholder students," you need to manually schedule students into those seats after loading the rest of the student schedules. For example, if you use this constraint in a section of a math course to hold five seats for Special Education students, you need to schedule those Special Education students into the math section after loading the other students' schedules.