Launching the MGED Program To launch the MGED program, type mged at the Terminal (tty) prompt and then press the ENTER key. This brings up two main windows: the MGED Command Window and the MGED Graphics Window (sometimes called the Geometry Window). Both windows will initially be blank, awaiting input from you. To leave the program at any time, at the Command Line type either the letter q or the word quit and then press the ENTER key.

2. Entering Commands in the Command Window You can type in commands at the mged> prompt. Many experienced UNIX users prefer this method because it allows them to quickly create a model (which we sometimes refer to as a “design”) without having to point and click on a lot of options. The complete listing of editing commands and what they do can be found in Appendix A. If sphere.g already exists, MGED will open the sphere.g database as the program is launched. 5. Using the GUI to Open or Create a Database Alternatively, once you have launched MGED, you can open an existing database or create a new database using the GUI menus (at the top of the Command or Graphics Window) by clicking on File and then either Open or New. Both options bring up a small dialog box. The Open dialog box will ask you to type in the name of an existing database. The New dialog box will ask you to type in the name of a new database. Click on OK to accept the database. For this lesson, create a new database called sphere.g. To do this, type sphere.g at the end of the path name, as shown in the following illustration. Click on OK to accept the database name.

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