Choose Paint > Flood Fill 
and click the area or color
you want to fill.
To flood or fill a consistently
colored area of an image layer with paint
- Choose Paint > Flood Fill .
The cursor becomes a paint bucket.
- Click the area or color on the image
layer you want to fill with paint.
- In the Flood Fill Options section
of the Paint Panel do the following:
- To set the fill paint color, see Set brush paint color.
- To set the fill paint opacity, set Opacity.
(For more information on opacity, see Set brush and paint opacity.)
- To set the range of colors to be filled,
set Tolerance. A low value fills
pixels having a color very similar to the color you clicked. A high
value fills pixels having a broader range of colors.
- Click Accept.
After Accept has
been clicked, flood fill options are no longer editable until another
floodfill operation is initiated. You can edit and modify the flood
fill options up until you click Accept, mouse
down on the image for another flood fill operation, or exit the
tool.
NoteAlternately, you can set the Flood
Fill Options before clicking the area or color on the
image layer you want to fill.
