Feathering specifies a width in pixels (0 to 200) that the selection is faded along the edges. When you move or paste the selection, feathering helps blend the selection into the surrounding area and makes it appear more natural. The higher the Feather value, the softer the edges. Set the width to 0 to create a selection with no feathering and distinct edges.
To feather a new selection, choose a selection tool (Selection, Freehand, or Magic Wand) and on the Tool Options palette adjust the Feather value. When you make the new selection, that feathering is used.
Use the Tool Options palette to set the feathering before creating a selection. After you create the selection, you can modify the feathering amount and the feathering position (inside or outside the selection border) using commands from the Selection menu.
To change the feathering amount:
Choose Selections > Modify > Feather.
Select the number of pixels for the feathering width, both inside and outside of the selection.
Click OK.
To adjust the position and amount of feathering:
Choose Selections > Modify > Inside/Outside Feather.
Note: In the dialog you can click the Toggle Selection button to change between showing only the selection or showing the selection and the rest of the image.
Select the feather position: Inside, Outside, or Both (the feather amount is added to each side).
In the Feather amount edit box, enter the width in pixels of the feathering.
Click OK.
To unfeather a selection:
Choose Selections > Modify > Unfeather.
Select the threshold value to remove of the feather.
Click OK.
Adding or Removing a Color from a Selection
Cleaning up the Edges of a Selection
Modifying the Select Selection Borders
Removing Specks and Holes from a Selection
Smoothing the Boundary of a Selection