When using an xpm graphic with the Help System, it is strongly recommended
that you fill out the xpm specification completely—that is, specify
a color value, a gray value, and a monochrome value for each pixel.
This allows the Help System to degrade the xpm image to your specifications if it cannot allocate
all of the colors for a particular graphic. This may occur, for
example, when Help is viewed on a display that does not have full
color support. It may also occur if Help is viewed on a system that
has other applications which make extensive use of the device's
color map. In these instances, if you have not completed the xpm specification, the Help System will display the
"Missing Graphic" icon instead of your .xpm image.