How do I change the eraser size and erase the markings?
A:
Do the following:
Tap the Eraser icon.
Tap Menu, if necessary, then Settings on your device.
Select the thickness (Thin, Normal, or Thick) and tap the button when you're done.
Drag your finger over the markings to erase them.
Note: You can't undo your last markings. You can either erase specific lines or tap the pen icon in the upper right corner to exit pen mode and clear all markings.