Undo vs Eraser
Why do we have to use a teeny-tiny fake eraser to erase? Why not just hit an "undo" button? An undo button that lets you undo in increments would be great. For example, the Microsoft Word program lets you undo each last step you performed. I would love to see an undo button in this app too. It would make things faster and easier. I mean, isn't math difficult enough? It would be a good excuse for updating the app too. Updates are always a good thing and one button is all I am suggesting. I think that an undo button would make this lovely application more pleasant to use. I know that using an old fashioned eraser is fitting, but I find that the eraser is not effective in that I still see remnants of the chalk after I erase. No offense, but I find that annoying. Thanks for this great app. I would be very grateful for an undo button. It's a great app and I am giving it 5 stars.
