Darken or lighten the edges to guide attention toward the center. This is the edge treatment sometimes called “vintage” in earlier conversations.
When to use it
Use it for a portrait, a quiet still life or a scene with distracting corners. A small amount often gives enough separation.
How to control it
Positive Amount darkens the edges; negative Amount lightens them. Zero removes the treatment. Select Size to change the open center independently of strength.
A starting approach
Choose Size first, then bring Amount away from zero. Compare the edges as well as the subject; a small center with strong lightening can hide too much of the frame.
Combine with intention
Choose one main direction first. Compare with the effect reduced or off before adding another treatment. Check the exported photograph as well as the preview.