% @(#)zoom_opto.hlq	19.1 (ESO-IPG) 02/25/03 14:27:23
%+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT   (c) 1991 European Southern Observatory
%.IDENT       zoom_plate.hlq
%.AUTHOR      A. Gemmo     Padova Department of Astronomy
%.KEYWORDS    MIDAS, help files, ZOOM/OPTOPUS
%.PURPOSE     On-line help file for the command: ZOOM/OPTOPUS
%.VERSION     1.0 12-SEP-1991 : Creation, AG
%---------------------------------------------------------------------
\se
SECTION./OPTO
\es\co
ZOOM/OPTOPUS                                       12-SEP-1991 AG
\oc\su
ZOOM/OPTOPUS [table] [zooming_factor]
	blow up section of Optopus plate and enable rejection of objects.

\us\pu
Purpose:     
             Blow up the area of the Optopus plate where objects overlap 
	     allowing an easier identification. The center of the area
	     is chosen interactively with the cursor from the plot 
	     displayed by the MODIFY/OPTOPUS command. After the zooming,
	     a cursor again enables the user to select objects in wrong
	     position so that they can be rejected by typing a "D" letter 
	     (uppercase or lowercase) when a prompt appears.
	     (See also documentation to MODIFY/OPTOPUS command).
\up\sy
Syntax:      
             ZOOM/OPTOPUS [table] [zooming_factor]
\ys\pa
	     [table]    =  input table of HOLES/OPTOPUS command which
	                   contains :RA and :DEC columns and refers
			   to the drawing of the Optopus plate plotted
			   by the MODIFY/OPTOPUS command.
			   Default name is "opto1.tbl".
\ap\pa
	     [zoom_fact] = Factor used to enlarge the chosen area of the
			   plate. Default is 5.

\ap\no
Note:        
             If after the first zoom one realizes it is not enough or
	     too much, it is possible to use again the command
	     ZOOM/OPTOPUS only changing [zoom_fact] and without having
	     to issue again MODIFY/OPTOPUS to re-plot the Optopus plate
	     and subsequently choose the center.
\on\exs
Examples:
\ex
	     ZOOM/OPTOPUS myoptotab 5
\xe\ex
	     ZOOM/OPTOPUS ? 10
\xe\ex
	     ZOOM/OPTOPUS myoptotab 10
\xe\sxe
