If
you want to use the color of a certain spot on the picture as
the current tool color, this tool will help you do it. Click the spot with this
tool and the mouse button you use will be assigned this color, for example,
clicking a yellow spot on the picture with this tool using the left mouse button
sets color 1 to be yellow, and using the right button sets color 2.
This tool has the option of using the average of multiple points
as the source; this is useful when working with very large images. The average
is done using a sampling area of M x M, where M is the current width value. You can also choose to sample from either the current layer or the
composite image.
Options
Single from This
This option takes the single pixel underneath the cursor in the current layer.
Group from This
This option takes the group of pixels underneath the cursor in the current layer.
Single from Composite
This option takes the single pixel underneath the cursor in the final image.
Group from Composite
This option takes the group of pixels underneath the cursor in the final image.
If
you want to use the color of a certain spot on the picture as
the current tool color, this tool will help you do it. Click the spot with this
tool and the mouse button you use will be assigned this color, for example,
clicking a yellow spot on the picture with this tool using the left mouse button
sets color 1 to be yellow, and using the right button sets color 2.
Single from This
Group from This
Single from Composite 
Group from Composite