You have the option of coloring survey according to the year in which they were surveyed. This allows you to see the survey history of the cave by following the colors.
Activating. You can turn on this option by selecting "Display->Color By->Color by Year" from the menu bar. You can also select it by hitting the "Y" key on the keyboard. Because of the limited number of colors, the program has to recycle colors. As a result, some years may have the same color.
Options. The Viewer also allows you to control the color and range of depth for each color band. This option is a part of the Complex Plotting options. You also have the option of using 12 or 24 colors depending on your video display.
Note: You can use the Depth Bar option to display a legend on the plot showing the meaning of the colors.