After the opening of an existing file, a 3D view of the structure, as shown in Figure 2, is displayed in CADAM3D's main window with the associated global coordinate system. The main menu and taskbar are adjusted to include new options related to model manipulation. The name of the opened file is shown between brackets at the top of the main window. Moving the mouse in the main window when the left button is pressed results in a change in the perspective angle and allows the model to be viewed in the desired direction. It is also possible to adjust the zoom using the mouse wheel and move the model vertically by holding the right mouse button. The model can be made transparent using the appropriate functions located in the Colors & Fill button. The current unit system, Metric or Imperial, can also be changed using the drop-down list located on the top left-hand side of the Model menu.

Figure 2