(Automated translation from Italian). The coordinates of the points to be interpolated or approximated may be changed to: 1) selecting, with the mouse cursor, the point to move and dragging it to the desired position. 2) Selecting, in the table, the coordinate to edit and write the new value in the Text box. Clicking an 'other box or by pressing the' Enter to confirm the new value; the Escape key restores the previous value. 3) Import a data file, generated by an other application with the menu command "Curve / Read to be interpolated" File of points.