How to use eraser or rubber tool in Windows 8 Paint?
Rubber tool is used to erase the part of the picture. When you erase a portion it will be filled with the default background color chosen.
Step 1: In home tab, select Rubber.
Step 2: To erase, hold the left mouse button and drag the portion.
In the above picture, particular portion of the image was erased using the rubber tool.You can enlarge the size of the eraser using ctrl++.