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 labelfont=Erg14	font name for axes labels			
 title=		title of plot					
 titlefont=Rom22	font name for title				
 labelcolor=blue	color for axes labels				
 titlecolor=red	color for title					
 gridcolor=blue	color for grid lines				
 style=seismic		normal (axis 1 horizontal, axis 2 vertical) or	
 		    	seismic (axis 1 vertical, axis 2 horizontal)	
 endian=		=0 little endian, =1 big endian			
 interp=0		no sinc interpolation				
			=1 perform sinc interpolation			
 x2file=		file of "acceptable" x2 values		
 x1x2=1		save picks in the order (x1,x2) 		
 			=0 save picks in the order (x2,x1) 		

 Notes:								
 Xpicker will try to detect the endian value of the X-display and will	
 set it to the right value. If it gets obviously wrong information the 
 endian value will be set to the endian value of the machine that is	
 given at compile time as the value of CWPENDIAN defined in cwp.h	
 and set via the compile time flag ENDIANFLAG in Makefile.config.	

 The only time that you might want to change the value of the endian   
 variable is if you are viewing traces on a machine with a different   
 byte order than the machine you are creating the traces on AND if for 
 some reason the automaic detection of the display byte order fails.   
 Set endian to that of the machine you	are viewing the traces on.	

 The interp flag is useful for making better quality wiggle trace for	
 making plots from screen dumps. However, this flag assumes that the	
 data are purely oscillatory. This option may not be appropriate for all
 data sets.								

 If the x2file=  option is set, then the values from the specified file
 will define the set of "acceptable" values of x2 for xpicker to	
 output. The format is a single column of ASCII values. The number of  
 specified values is arbitrary.					

 Such a file can be built from an SU data set via:			
     sugethw < sudata key=offset output=geom > x2example 		

 If the value of x2file= is not set, then				
 xpicker will use the values specified via: x2=.,.,.,. or those that are", 
 computed from the values of f2=  and d2= as being the "acceptible
 values.								

 See the selfdoc of  suxpicker  for information on using key fields from
 the SU trace headers directly. 					



 Author:  Dave Hale, Colorado School of Mines, 08/09/90
 with picking by Wenying Cai of University of Utah.
 Endian stuff by Morten Pedersen and John Stockwell of CWP.
 Interp stuff by Tony Kocurko of Memorial University of Newfoundland
 Modified to include acceptable values by Bill Lutter of the
     Department of Geology, University of Wisconsin 10/96
 MODIFIED:  P. Michaels, Boise State Univeristy  29 December 2000
            Added solid/grey color scheme for peaks/troughs
 
 G.Klein, IFG Kiel University, 2003-09-29, added cursor scrolling and
            interactive change of zoom and clipping.

 NOTES:
 Interactive picker improved to allow x-axis of picks to be
 coordinated with "key=header" parameter set in driver routine
 suxpicker. Multiple picks per trace are now allowed.

  Input:
  The command line of suxpicker is unchanged.  The parameter"key=header"
  set in  suxpicker controls a) trace x-axis  displayed via xpicker and
  b) the header values in the first column of a pick file either read in
     or written out from xpicker c) header values expected in optional file
      or written out from xpicker c) header values expected in optional file
     x2file= which reads into xpicker allowable trace x-axis values.

   a) example command line:  suxpicker key=offset < shot10.plotpik

   b) pick file format:
	x-axis_value_1 time_1
	x-axis_value_2 time_2  
	x-axis_value_3 time_3
	etc.
	x-axis_value_n time_n

	pick file example:
         1000.000000 0.500000
         2000.000000 1.000000
         3000.000000 1.500000
         4000.000000 2.000000
         5000.000000 2.500000

  c)  format of optional file x2file=:
    	   header_value_1
 	   header_value_2
	   etc.
	   header_val_m

       If file "x2file=" exists in directory from which suxpicker is
      invoked, then these trace header x-axis values are the only allowable
      x-axis pick values used in the pick "add" or "delete" menu operation.
      Header values do not need to be sorted or 1 to 1 with input traces.
      Further, pick file x-axis values can be read into xpicker via load
      operation without having to match key_pickx1_val x-axis values and
      can also be rewritten out an output pickfile.  As indicated, only
      the "add" and "delete" pick operations are influenced by existence
       of this file.

      Offset header values for "x2file=" can be generated by the
      command line:

      sugethw < su_segyfile key=offset output=geom >  x2examplefile=

      Output: Only change is in format of pick_file (format described above).
      If x2file= file exists then x-axis value of added picks
      will be forced to nearest allowable trace x-axis value (input values
      of x2file= file). If x2file= is not set, then the values of x2 
      that are either assigned uniformly to the traces via f2 and d2,
      or by the vector of values of x2=.,.,.,.    will be the "acceptable"
      values.