I found it on Raymarine.com!!
After setting the waypoint on the plotter you select the "track" feature on the autopilot. The autopilot will then track to the plotter heading.
Here is what I got from Raymarine:
Once you are close to your intended track line, and your rudder
is amidships, press the AUTO key on the autopilot. The pilot will lock onto the current
course. At that point, press the TRACK (or NAV on some models) key. the pilot will pause momentarily as it looks for the presence of a destination
on the network, and calculates the course it must steer. The pilot will alarm
, and will indicate visually on screen
the direction it intends to turn (port or starboard), and the course it will be turning to. You should verify that there is no danger
or grounding in that direction, and when ready, press the TRACK key again. Now, the autopilot is in control, and will steer to the bearing and cross-track-error information sent to it by the GPS
or chart plotter.