Disc drives are not automatically detected. The icon shading style, shaded titlebar and full-width scrollbar slider are features that Apple demanded should be removed. GEM uses a program called Output to produce graphical output to a printer or a plotter. In the example above, one .GEM file has been added to the output list. In normal use, a program will produce a .GEM file of output to be printed, and then run Output on this file.
Output then allows the user to set which printer was being used and any printer options.