In box 2, click percentages first, then click grams, ounces, etc below that and enter the number at the front of that line. You must do that in that order to get the percentages and the ounces or grams. This is my only lye calculator these days, and thank goodness for it!
The creator of it came here, to this very forum, to ask what we needed in a soap calculator! We all got to put our two cents in. It truly meets all my needs in a very newbie friendly format. I love that I can save and share recipes! I can even leave notes, so I have no need to keep a dead tree notebook (I still do, but I don't need to.).
I have had the same trouble. I have to say the pale gray underlines could be a bit darker for legibility, especially given the other color -- the blue -- is so very bright by comparison. I imagine people who use Soapee a lot get used to it, but that doesn't help the newcomer.