

      An angular scale shows from 'Tools', 'Scale'.   

      The fine gradations are degrees. 

      The scale can be accessed once a simulation has 
      been run or is running.  It is available in all 
      views.  Select a sun centered view to measure 
      distances from the sun.

      The scale can be fast or slowly rotated with the 
      buttons on the small control panel that appears.

      The scale can be removed with the 'X' button or 
      the menu command.

      If showing, the scale (but not the controls) 
      appears on stored simulations.

      The scale colours are sometimes patchy depending 
      on the background and the local simulation intensity.  
      A pure colour scale can be permanently stamped on 
      to the simulation by clicking 'FIX'.   If the 
      colour is not as required, another scale can be 
      stamped on top.   'Fixed' scales cannot be 
      removed.


