What is meant by the term "overlay" in art applications?

The term "overlay" in art applications refers to the process of superimposing one visual element over another. This technique is commonly used to create depth, texture, or complex visual relationships within a composition. By placing one element on top of another, artists can enhance the narrative or visual complexity of their work. This method is often seen in various forms of art, including painting, digital design, and printmaking, where the interaction between the overlying and underlying elements can result in new hues, shapes, and meanings that wouldn't exist if the elements were kept separate.

The concept of overlay is foundational in various art practices and can significantly alter the perception and impact of the artwork on the viewer. When effectively executed, overlay can lead to dynamic contrasts, harmonies, or thematic layers that engage the audience more fully.