• The "Eraser Tool" is used to erase the unwanted contents in the layer. Shortcut "E".
• The standard erasers are: "Eraser, Background and Magic Eraser Tool".
• The "Eraser Tool" is used to erase a portion of the image
• The "Background Eraser Tool" is used to erase the background of an image.
• The "Magic Eraser Tool" is used to erase the interconnected portion of the image.
• Use these erasers tool by simply clicking on the eraser icon on the toolbar and then click and drag it over the area of an image to be erased.
• On the Options bar, you may also define the brush size, erasing mode, opacity, tolerance, anti-aliased,etc.,
• In case, if you want to retreive the erased image, check the option "Erase to History" in Options bar and drag over the image.

Video Tutorial: