A GIF image in which the individual pixels are represented in blocks stored out of order: for example, a block may consist of ninety pixels with ten pixels per block, and is stored in the order block1, block4, block7, …, block2, block5, block8, …, block3, block6, block9, … When such a GIF image is transferred to the browser the image is built up in the order that the blocks are stored; hence the user is given the impression of a graphic gradually being built up from a rather foggy image to the point where the final image is displayed. Such graphics enable the browser user to gain a quick idea of what is in an image before deciding whether they are going to transfer to another Web page or stay with the page that they are browsing. An interlaced GIF occupies slightly more memory space than a normal GIF image. It is not recommended for text GIFs as such images are not really clear until they have all been transferred to the browser. See also thumbnail image.