the term tube sometimes shortened to tub but pronounced tube tube refers to a picture tube It is a graphic image formatted to be used in the Jasc Corporation Paint Shop Pro Programs It is a type of file that is used with the Jasc Paint Shop Pro program (PSP) It is a transparent image such as a teddy bear - faerie - star - dragon with no background they are pictures but in a file format that ends in .tub in psp version 6 .psp in psp version 7 .pspimage in psp version 8 they only work in the program know as psp or paint shop pro u cannot see them in a thumbnail view on ur puter they can only be seen inside of psp |