How does one differentiate a "fly by" from a "fly over" waypoint?
A flyover waypoint will have a circle drawn around it on a chart, whereas a fly-by waypoint will not. (Easy to remember: the circle looks like the O in Over)

The symbols for a fly-by and a flyover waypoint in aeronatutial maps and charts can be differenciated by the circle surrouning flyover waypoints.


https://www.skybrary.aero/index.php/Waypoint