I can tell you from a ton of experience that the minus sign doesn't work. If it worked for you, that is great; but it has never worked for me.
Aargh. You are kidding me. I have never needed to try it. I just though Wendell might have overlooked it.
Well, dang! That's what needs to be fixed then!
Here's the priority list:
1. Fix the position adjuster on the Prescription Writer.
2. Create a prescription form that allows you to write on the free prescription pads we get. That's the cheapest and best solution.
