I already asked to restrict the possibility to rebalance the polypad balance.
I just told a colleague about the possibilities of the balance and wanted to show her the prepared pages. But I was a bit surprised about the (I think) new feature to negate a number card.
Uhh ... I don't like that!
I think, you should add the possibility to restrict some settings. I'm sure you know Graspable Math and I like the possibility to customize how the canvas react on special actions. I think that "negate" and "balance" are two of these setting that can cause some trouble, if I want to prepare worksheets for my pupils and they should do special things with that.
What do other users think about that!?