Customize feature doesnt work

Im a pharmacist that goes on codes. I got the app to help me keep track of the drugs, especially the ones you dont use that often to help save time. But the customize feature, as pointed out in another review, does not work. There is no box to type in your own entry. Please fix!!! I would love to be able to get rid of the book I have to carry with me.

Boonepharm about Full Code Pro