Question

what means to remove unwanted area of an image​

Answer 1

Answer:

Auto Erase with the Pencil tool

Specify foreground and background colors.

Select the Pencil tool .

Select Auto Erase in the options bar.

Drag over the image. If the center of the cursor is over the foreground color when you begin dragging, the area is erased to the background color.

Explanation:

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Answer 2

Answer:

it means to remove unwanted (which u don't want) area of an image....

extra area which is useless