Cách sử dụng
The word 'overlay' means to cover or place something on top of another thing. It is often used in the context of putting a layer of something over something else, such as an image or text. For example, you might overlay text on a picture to add a caption or description. It can also be used in a more technical sense, such as in computer graphics or video editing, to describe the process of adding one image or video clip on top of another.