Read pages 141 thru 144 here ... (for core series button units) ...

https://www.manualslib.com/manual/10...age=141#manual

This is using waypoints that are already in the unit memory (working within the Waypoint Management Menu under the Nav tab) ...

If desired waypoints are not already in the unit memory - waypoints can be created on the Chart view (or with the Mark button while on the water) and then use the procedure above to create a future route ...

Rickie