COMPUTER FUNDAMENTALS

Detailed explanation-1: -However, you can rasterize these layers to convert their contents into a flat, raster image. Once your layer is rasterized, you cannot edit them earlier because they are now converted to pixel-based layers.

Detailed explanation-2: -What’s the difference between merging layers and flatten image? The difference is that flatten image will combine all the layers in the Photoshop document into one, while merging layers will let you either merge all layers, the selected layers, or only the visible layers.

Detailed explanation-3: -When you finish editing all the layers in your image, you can merge or flatten layers to reduce the file size. Flattening combines all the layers into a single background layer.

Detailed explanation-4: -Merging all visible layers into the background layer to reduce file size.