Replacing a background in Photoshop on the web offers a simple way to enhance a photo's composition or add creative flair. This tutorial walks you through using the Remove Background feature from the Contextual Taskbar, which isolates the subject and removes the existing background. From there, you can choose to generate a new background, import an image, or fill it with a solid color or gradient. A Layer Mask preserves the original background, allowing for easy toggling between edits. With these tools, swapping backgrounds becomes a seamless and flexible process in Photoshop.