Focus effects like Blur direct the viewer's attention by selectively emphasizing or de-emphasizing parts of the image. Vignettes darken edges to draw the eye inward; tilt-shift and blur effects simulate selective focus for a miniature or dreamy quality.

Composition tip: These effects work best when your subject is already near the center or a strong focal point. Apply at moderate intensity — the effect should guide the eye naturally without being immediately obvious as a filter.