Disconnect xy coordinates ROI(ImageJ)

This is my trajectory of a particle over frames. I imported XY coordinates on this image using an internal function of ImageJ(File-import-XY coordinates…). It connects the coordinates altogether. I want to disconnect between the starting point[1 in attached image] and the final point[2] to show its trajectory from 1 to 2.
How can I disconnect them?
Or is there any good other way to show trajectories on an image?