not matter +value or -value) and hit the Left Mouse Button.
 
  If you want to restore all observations with residuals by modulo less
than some value, position the cursor to the points with that value
(does not matter +value or -value) and hit the Right Mouse Button.
 
  Keep in mind: these two operations are not reciprocal.
 
  REPA updates the plot as soon as you hit the Central Mouse Button, but
it delays updating scratch file. It stores all entered commands in stack.
Any time  you can hit &lt;BackSpace&