Q: When I use the mouse button to adjust the amount of Yogurt
to half a cup, why isn't [1 cup]
changed to [.5 cup]?
A: The [1 cup] amount in the listbox is not changed to avoid
confusion when further adjustments are made. For example,
if [1 cup] is changed to [.5 cup], when you use the mouse
to select .25 units, it's not clear whether you are selecting
1/4 of [1 cup] or 1/4 of [.5 cup].