DVD burners such as as K3b and GnomeBaker use standard commands for manipulating .ISO images, such as mkisofs. However, they give users only limited control over the resulting images beyond selecting their contents. Users cannot even save the image to an .ISO formatted file; instead the burners save in their own project formats. Fortunately, this functionality gap is bridged by ISO Master, a program that, despite a slightly awkward interface, is intuitive enough that most users can quickly learn its fundamentals without having to refer to online help. Only the adding of a boot record is likely to give average users any trouble.