The "rule of thirds" is a fundamental principle in photography and visual arts that helps create balanced and engaging compositions. It involves dividing an image into nine equal parts by two horizontal and two vertical lines, forming a grid. The key elements of the scene are then placed along these lines or at their intersections, which are known as "power points." This technique draws the viewer's eye and creates a more dynamic image. Using the rule of thirds can enhance the visual appeal of various subjects, such as landscapes, portraits, and still life. For example, when photographing a landscape, placing the horizon along one of the horizontal lines can create a more interesting composition. Similarly, positioning a subject at a power point can make the image feel more balanced and engaging.