Sam --
In the Gantt Chart view, click Window - Split. This view is known as the
Task Entry view. In the top pane, you have the Gantt Chart; in the lower
pane, you have the Task Form, where you can access the Units field for each
resource you assign to a task. In fact, I strongly recommend you use this
Task Entry view for assigning resources to tasks, as it gives you complete
control over all features of the Microsoft Project scheduling engine. Hope
this helps.