The value in the entry area can be changed by one of the following methods.

To change the value in the entry area, the figure in the box should be highlighted. If the figure is not highlighted, press the softkey for the marker you are using (marker 1 to marker 9, Ref Marker) or Foc to highlight the figure. 

You can move the marker by dragging and dropping either one of the marker position pointers above and below the graph (pressing the button on the object to be moved and releasing the button on the destination). In rectangular display format, you can move a marker itself by dragging and dropping it.