The Refine Selection Tool allows you to more precisely define selection edges in your image. A selection needs to be in place before refinement can be carried out.
Settings
The following settings can be adjusted from the context toolbar:
Preview—sets the way your selection and page display. This helps you distinguish between selected and unselected image areas during refinement.
Adjustment—determines the adjustment brush's refinement mode.
Matte—re-analyses the selection and attempts to separate foreground detail from the background. Great for selecting hair against a background.
Foreground—adds to the selection (revealing more of the foreground).
Background—deletes from the selection (revealing more of the background).
Feather—softens the alpha edge of the selection.
Width—sets the width of the brush tip.
Output—determines how the selection is applied:
Selection—applies the refinement directly to the selection.
Mask—applies the refinement to the selection as a mask.
New Layer—applies the refinement to the selection in a new layer.
New Layer With Mask—applies the refinement to the selection as a mask in a new layer.
Border—expands the selection by adjusting the width of its border.
Smooth—determines the curvature of the selection's edge.
Feather—determines the softness (opacity) of the transition at the edge of the selection.
Ramp—changes the size of the selection. Negative values will shrink the selection while positive values enlarge it.