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+	       Interactive Keystroke Commands
+
+?	Print help
+:	Colon commands
+v	Verify the critical parameters
+w	Save the current parameters
+d	Plot radial profile of current star 
+i	Interactively set parameters using current star
+f	Fit current star
+spbar	Fit current star, output results
+m	Move to next star in coordinate list
+n	Fit next star in coordinate list, output results
+l	Fit remaining stars in coordinate list, output results
+e	Print error messages
+r	Rewind the coordinate list
+q	Exit task 
+
+
+
+                 Colon Commands
+
+:show	[data/fit]	List the parameters
+:m [n]	Move to next [nth] star in coordinate list
+:n [n]	Fit next [nth] star in coordinate list, output results
+
+
+		Colon Parameter Editing Commands
+
+# Image and file name parameters
+
+:image		[string]	Image name
+:coords		[string]	Coordinate file name
+:output		[string]	Output file name
+
+# Data dependent parameters
+
+:scale		[value]		Image scale (units per pixel)
+:fwhmpsf	[value]		Scale factor (scale units)		
+:emission	[y/n]		Emission feature (y), absorption (n)
+:sigma		[value]		Standard deviation of sky (counts)
+:datamin	[value]		Minimum good data value (counts)
+:datamax	[value]		Maximum good data value (counts)
+
+# Noise description parameters
+
+:noise		[string]	Noise model (constant|poisson)
+:gain		[string]	Gain image header keyword
+:ccdread	[string]	Readout noise image header keyword
+:epadu		[value]		Gain (electrons  per adu)
+:readnoise	[value]		Readnoise (electrons)
+
+# Observation parameters
+
+:exposure	[string]	Exposure time image header keyword
+:airmass	[string]	Airmass image header keyword
+:filter		[string]	Filter image header keyword
+:obstime	[string]        Time of observation image header keyword
+:itime		[value]		Exposure time (time units)
+:xairmass	[value]		Airmass value (number)
+:ifilter	[string]	Filter id string
+:otime		[string]	Time of observation (time units)
+
+# Fitting parameters
+
+:function	[string]	PSF model (radgauss|elgauss|moments)
+:box		[value]		Width of the fitting box (scale units)
+:maxiter	[value]		Maximum number of iterations
+:nreject	[value]		Maximum number of rejection cycles
+:kreject	[value]		Rejection limit (sigma)
+
+# Plotting and marking functions
+
+:mkbox		[y/n]		Mark the fitting box on the display