OK, I think I understand what you are looking for now. All you want is to force the object to move only on the X-Axis, right? Not, as you said [quote:giy1ciz8]know whether you're moving left or right
All you need to do is, in the drag and drop properties, change the Axes to Horizontal instead of both. Select the object on the right and you will see it's properties on the left.