The Eraser that you can select with the buttons allows you to change the size of the rectangle that is used to erase objects. I have my app configured to use a single finger to erase objects, but there does not seem to be a way to adjust the size of the Eraser for when the finger is used.

I would like a way to adjust both sizes of both styles of erasers as well. It would be ideal if I could adjust those two sizes as two separate sliders, not as a single slider for both.