The Periodic Orbit Panel is opened by selecting the
option Periodic from the Panels menu button located on the Command
Window. The default configuration hides the
text fields which exist below command buttons. These text fields
are shown or hidden according to the value of the Settings setting.
Colorcoding is performed according to the stability type of
objects: saddle points are marked as green crosses, sinks are
blue triangles, and sources are red squares. Furthermore,
unstable manifolds are plotted in red and stable manifolds
are plotted in blue.