Selections and masks are subtly different, and the ‘parametric’ masks in non-destructive editors give more flexibility than ever.
Creating a smooth transition between one photo and another in a montage, or between areas where different adjustments have applied. A sharp division gives the photo an unnatural look, but blending in an adjustment smoothly looks more natural. One technique is to ‘feather’ a selection before making adjustments. Blending is often used with graduated or radial filter tools.
‘Local adjustments’ is a bit of a catch-all term. It means picking out an area of an image for adjustment while leaving the rest unchanged. So how do local adjustments work and which software does them best?