Define its brush size and other attributes with the brush and options windows. Good tool for correcting minor filter spill-overs or other mistakes. Eraser Tool Exaclty what it says. Use it to erase parts of the image. Yet another tool to correct mistakes.
All tools are defineable with the brush and options windows.
These tools are similar to darkroom techniques. Each tool is defineable with the brush and options windows. Pen Tools Used to define paths. Follows edges and contours like the magnetic selection tool. Type Text Tools Writes text on the image.