StructofStacked = struct(app.Logs(app.Log).Stack{1});
DataCursorGet = struct(StructofStacked.DataCursor);
DataCursorGet.CursorLine.LineWidth = 0.5;
DataCursorGet.EnterDatapointListener.Enabled = 0;
The EnterDatapointListener seems to contol the visibility of the CursorLine via callback. Changing the lines visibility manually didn't work, of course.
Thanks Adam!