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   The exact distance and position angle between two _objects_ may be
obtained in a different way:  Right-click on the first object; the
information box described in the preceding chapter will appear. Click OK,
and repeat the process with the second object. Now hit Insert.  Guide will
now compute exact data between the two objects,  and measuring errors are
avoided.  In general,  just dragging a line between two points will work
well enough;  but there are cases where you may want a truly precise value.

6b:  Quick Info                                 

   For some general-purpose information,  one wants easy access.  The
"Quick Info" option in the Help menu lists much of this sort of data,
like planetary positions, times of lunar phases,  current local and
Greenwich sidereal times,  comets brighter than magnitude 15,  asteroids
brighter than magnitude 11, the current equation of time,  and the
currently-set date in various calendars (Hebrew,  Islamic,  French  
Revolutionary,  and so forth.)                      
                                                    
   It will also give the limiting visual magnitude for the currently
centered part of the sky for the currently set time, using a method
described by Bradley E. Schaefer in the May 1998 issue of Sky &
Telescope.

7:  DISPLAY MENU                              

   The Display Menu controls what is shown by Guide and how it is
displayed. This menu shows the following items:

Star Display
Data Shown
Legend
CCD Frame
Inversion Menu
Ticks,  Grids,  Etc.
Screen font
Printer font
Direct to screen
Background
Isophotes

   The Star Display option (page 17) brings up a dialog box with
controls over how stars are labelled,  their sizes, and whether they
are colored by spectral type.

   The Data Shown option (page 20) brings up a dialog box showing
the main types of celestial objects shown by Guide (variable stars,
galaxies, etc.) and providing control over how they are shown
and labelled.

   The Legend option (page 24) is checked when the legend is turned on.


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