RV Fourier Cross Correlation Task Commands

    ?  Help 		   -  Subtract blend 	   +  Toggle status line
    a  Antisymmetric plot  b  Fix the background   c  Cursor read
    d  Deblend 		   e  Summary plot 	   f  Fourier mode
    g  Mark limits of fit  I  Interrupt 	   j  Plot residuals
    l  Page results 	   m  Mark ccf points	   n  Next
    o  Fit obj continuum   p  Previous 	   	   q  Quit
    r  Redraw 	 	   s  Spectrum mode 	   t  Fit temp continuum
    v  Verbose output 	   w  Write 		   x  Do correlation
    y  Set fit lower limit z  Zoom on CCF

    :apertures 	  :apnum      :apodize 	    :autowrite    :autodraw
    :background   :ccftype    :comment	    :continuum    :correction
    :deltav       :disp       :filter       :function     :height
    :imupdate     :maxwidth   :minwidth     :nbang        :next
    :objects      :output     :osample      :pbang        :peak
    :pixcorr      :previous   :printz       :rebin        :results
    :rsample      :sample     :show         :templates    :tempvel
    :tnum         :unlearn    :update       :version      :verbose
    :wccf         :weights    :width        :wincenter    :window
    :ymin         :ymax


    ?  Print list of cursor key and colon commands
    -  Subtract blended component from correlation peak
    +  Toggle status line output
    a  Display the antisymmetric noise component of the correlation
    b  Fix the background level for the Gaussian fit
    c  Read the cursor in velocity and lag units
    d  Deblend multiple correlation peak
    e  Preview the summary plot of the correlation
    f  Fourier filtering and FFT display mode
    g  Mark correlation peak lag limits and fit
    I  Interrupt
    j  Plot the residuals of the fit to the peak
    l  Page the current logfile of results
    m  Plot polymarkers of actual CCF points on the plot
    n  Go to next (template --> aperture --> object)
    o  Fit or refit object spectrum continuum for subtraction
    p  Go to previous (template --> aperture --> object)
    q  Quit task
    r  Redraw
    s  Examine object/template spectra and display mode
    t  Fit or refit template spectrum continuum for subtraction
    v  Print full correlation results in text window
    w  Write current correlation results to the log file
    x  Compute correlation
    y  Mark correlation peak lower limit and fit
    z  Expand on different correlation peak using full correlation plot

    :apertures [range] 			Set/Show list of apertures to process
    :apnum  [aperture] 			Set/Show specific aperture to process
    :apodize  [fraction] 		Set/Show fraction of endpts to apodize
    :autowrite [y|n] 			Set/Show autowrite param
    :autodraw  [y|n]			Set/Show autodraw param
    :background  [background|INDEF] 	Set/Show background fitting level
    :ccftype  [image|text] 		Set/Show type of CCF output
    :comment  [string]			Add a comment to the output logs
    :continuum  [both|obj|temp|none] 	Set/Show which spectra to normalize
    :correction shift			Convert a pixel shift to a velocity
    :deltav				Print the velocity per pixel dispersion
    :disp				Print rebinned dispersion info
    :filter  [both|obj|temp|none] 	Set/Show which spectra to filter
    :function [gaussian|lorentzian| 	Set/Show CCF peak fitting function
		center1d|parabola]
    :height  [height] 			Set/SHow CCF peak fit height
    :imupdate  [y|n] 			Set/Show image update flag
    :maxwidth  [width] 			Set/Show min fitting width
    :minwidth  [width] 			Set/Show max fitting width
    :nbang  				:Next command without a write
    :next [temp|aperture|object]	Go to next correlation pair
    :objects  [list] 			Set/Show object list
    :output  [fname] 			Set/Show output logfile
    :osample  [range] 			Set/Show object regions to correlate
    :pbang  				:Previous command without a write
    :peak  [y|n] 			Set/Show peak height flag
    :pixcorr  [y|n] 			Set/Show pixel correlation flag
    :previous [temp|aperture|object]	Go to previous correlation pair
    :printz  [y|n]			Toggle output of Z values vs. velocity
    :rebin [small|large|obj|temp]	Set/Show the rebin parameter
    :results [file]			Page results
    :rsample  [range] 			Set/Show template regions to correlate
    :show [filt|contin|keyw]		List current parameters
    :templates  [list] 			Set/Show template list
    :tempvel  [velocity] 		Set/Show template velocity
    :tnum  [temp_code]			Move to a specific template in the list
    :unlearn [filt|contin|keyw]		Unlearn task parameters
    :update [filt|contin|keyw]		Update task parameters
    :version				Show task version number
    :verbose  [y|n] 			Set/Show verbose output flag
    :wccf				Write out the CCF to an image|file
    :weights  [weight] 			Set/Show fitting weights
    :width  [width] 			Set/Show fitting width about peak
    :wincenter  [center] 		Set/Show peak window center
    :window  [size] 			Set/Show size of window
    :ymin  [correlation height]         Set/Show lower ccf plot scaling
    :ymax  [correlation height]         Set/Show upper ccf plot scaling