1. Select the replace tool.
2. In the assignment dropdown, select the assignment you wish to now be scheduled for.
3. Select the assignment on the calendar you are replacing. You will likely get a message letting you know that the assignment is incompatible, you will want to select OK when this is displayed.
If you are given the option to add a note and reason add them and select OK.
Your addition of the new assignment and the deletion of the old assignment will now be on the schedule in a pending status waiting on administrative approval.