Courses and Waypoints

So I've got a multi-day hike coming up so I downloaded the gpx file from a hiking website.

It's on Garmin Connect and transfers to the watch (6X) without issue.

However the course does not have any way points. I would like to add one for each campsite so I know each day how much farther I have to go that day.

I can't see how you add way points or even edit the course in Garmin connect?