Hm, when I cut with the knife tool I have two … sections in the gpx file. Maybe you want something different like two separate gpx files?
For my own planning I cut a single (long) gpx into pieces of ~X km. I’ve modified the source of a small program called GpxSplitter to do that. Each piece is saved as a new *.gpx file, e.g. plan-1.gpx, plan-2.gpx, …
Edit: Sorry, wrong link. Probably this one is about the program that I meant: https://github.com/AntoCuc/GpxSplitter
Edit2: The knife buttons seem to be disabled when you activate the OpenStreetMap view. They are enabled in the Preview.
Found it: You have to right-click in the altitude window at the bottom, NOT on the track on the map.
I wanted to slice a track into sub-tracks, based on 1) distance, 2) elevation, and 3) housing, so it had to be done manually. A bike day with high elevation has to be shorter than one with a flat road.
One useful feature found in GTE that GPX Editor is missing, is displaying each segment in a different color.
Two more questions, since GPX Editor’s online forum seems gone for good (Dec 2020):
In GPX files, what’s the difference between and ?
Is there a way to change the language UI in Gpx Editor?
A single can contain multiple . Typically each segment contains a sequence of recorded points, while there can be large gaps between two segments. When I use “reset trip data” on my Garmin Oregon it creates a new segment.
I don’t think that GPXEditor supports different languages.