Cruiser Walk 1 2 3 4.

Cruiser.
Walk 0(start)_1 _2 _3(end) gpx navigation track import.
Set to show show additonally as red overlay track reference.
Add a shaping point, change the position and observe the rerouting result.
The red track overlay shows the imported track path before the change.
Walk 0(start)_1_2_3_4(end). Export as gpx navigation preserves all extra.