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+1. IDENTIFY CURSOR KEY SUMMARY
+
+?  Help                   k  Next line              u  Enter coordinate
+a  Affect all features    l  Match list (refit)     v  Weight
+b  Auto identification    m  Mark feature           w  Window graph
+c  Center feature(s)      n  Next feature           x  Find shift
+d  Delete feature(s)      o  Go to line             y  Find peaks
+e  Add lines (no refit)   p  Pan graph              z  Zoom graph
+f  Fit positions          q  Quit                   .  Nearest feature
+g  Fit zero point shift   r  Redraw graph           +  Next feature
+i  Initialize             s  Shift feature          -  Previous feature
+j  Preceding line         t  Reset position         I  Interrupt
+
+2. IDENTIFY COLON COMMAND SUMMARY
+
+:add [image [ap]]         :fwidth [value]           :read [image [ap]]
+:coordlist [file]         :image [image]            :show [file]
+:cradius [value]          :labels [type]            :threshold [value]
+:database [file]          :match [value]            :write [image [ap]]
+:features [file]          :maxfeatures [value]      :zwidth [value]
+:ftype [type]             :minsep [value]           
+
+3. IDENTIFY CURSOR KEYS
+
+?  Clear the screen and print menu of options
+a  Apply next (c)enter or (d)elete operation to (a)ll features
+b  Automatic line identifications: queries for approx. coordinate and dispersion
+c  (C)enter the feature nearest the cursor
+d  (D)elete the  feature nearest the cursor
+e  Add features from coordinate list with no automatic refit
+f  (F)it a function of pixel coordinate to the user coordinates
+g  Fit a zero point shift to the user coordinates
+i  (I)nitialize (delete features and coordinate fit)
+j  Go to the preceding image line or column in a 2D or multispec image
+k  Go to the next image line or column in a 2D or multispec image
+l  Add features from coordinate (l)ist with  automatic refit
+m  (M)ark a new feature near the cursor and enter coordinate and label
+n  Move the cursor or zoom to the (n)ext feature (same as +)
+o  Go to the specified image line or column in a 2D or multispec image
+p  (P)an to user defined window after (z)ooming on a feature
+q  (Q)uit and continue with next image (also carriage return)
+r  (R)edraw the graph
+s  (S)hift the current feature to the position of the cursor
+t  Reset the position of a feature without centering
+u  Enter a new (u)ser coordinate and label for the current feature
+v  Modify weight of line in fitting
+w  (W)indow the graph.  Use '?' to window prompt for more help.
+x  Find zero point shift by matching lines with peaks
+y  Automatically find "maxfeatures" strongest peaks and identify them
+z  (Z)oom on the feature nearest the cursor
+.  Move the cursor or zoom to the feature nearest the cursor
++  Move the cursor or zoom to the next feature
+-  Move the cursor or zoom to the previous feature
+I  Interrupt task and exit immediately.  Database information is not saved.
+
+
+4. IDENTIFY COLON COMMANDS
+
+The parameters are listed or set with the following commands which may be
+abbreviated.  To list the value of a parameter type the command alone.
+
+:show file		Show the values of all the parameters
+:features file		Write feature list to file (default is STDOUT)
+
+:coordlist file		Coordinate list file
+:cradius value		Centering radius in pixels
+:threshold value	Detection threshold for feature centering
+:database name		Database for recording feature records
+:ftype value		Feature type (emission or absorption)
+:fwidth value		Feature width in pixels
+:image imagename 	Set a new image or show the current image
+:labels value		Feature label type (none|index|pixel|coord|user|both)
+:match value		Coordinate list matching distance
+:maxfeatures value	Maximum number of features automatically found
+:minsep value		Minimum separation allowed between features
+:read name ap		Read a record from the database
+			(name and ap default to the current spectrum)
+:write name ap		Write a record to the database
+			(name and ap default to the current spectrum)
+:add name ap		Add features from the database
+			(name and ap default to the current spectrum)
+:zwidth value		Zoom width in user units
+
+Labels:
+      none - No labels
+     index - Sequential numbers in order of increasing pixel position
+     pixel - Pixel coordinates
+     coord - User coordinates such as wavelength
+      user - User labels
+      both - Combination of coord and user