In your chart page, you will want click menu, then scroll down to waypoints, routes, and trails.
Hit enter, and scroll right to trails up on top.
Hit enter, then make sure the display and record are highlighted or have an X.
You can also chose your color of choice on this page. Once record and display are activated, hit save and exit out. You should then have a new trial from that point on.
You can save, name, and edit trails and start new ones at any time also.
Once your trail is being recored on chart page and you can see it, you can hit enter to save a waypoint.
Hope this helps.