Isosurfaces: Visualizaton Tools and the Orthogonal Slices:

Overlay Image:

Overlay images are often useful to help the practitioner overlay sketches or contour maps for geographical orientation. Selecting the Image button on the widget, allows the user to overlay `ppm' image format files over the appropriate slices by selecting the radio button  I  to the right of each of those slices (see Figure 19).

Figure 19: Overlaying Images