Points may be moved to a new location in the grid by following this procedure:
Click the Edit button and make sure it is depressed
Highlight the point to move by clicking it's row\
Right - click the highlighted row, and while holding down the right-click, drag the point to a new location. A thick indicator bar will show the new location
Release the right-click at the desired location
Click the Edit button to prevent editing
Note that the points will be renumbered consecutively