Bullets are small circles or rectangles that are drawn on top of the
data points of the paths in a case window. The color and/or size of
these bullets visualizes a selected aspect of the path data. For example
you can use bullets to color-code the speed of an animal, or the amount
of time spent resting in a given place, etc. You create bullets in a
Custom variable definition file which you apply to the data using the
Analyze Case command.
See Managing custom variable definition
files to learn more on variables, variable definition files and
path data analysis in Wintrack.