shifting a group of markers or positions at once

[Shuben]

OK, tested.
For the track (4642 points) I had send to you it works well. Attached see the screenshots (before / after moving) from the end of the track that I dragged and where the start point has moved. Somewhere in between there are some deviations but its max 20m - 50m. That is no issue, at least for me.
I guess its caused by the map precision. (?)

I found best is to drag a point in the middle of the section/group of points you want to move.
Let me know what further testing is required.

Shuben