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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 star near cursor
+i	Interactively set parameters using star near cursor
+f	Find stars in the image
+spbar	Find stars in the image, output results
+q	Exit task
+
+
+		Colon Commands
+
+:show		[data/center]	List the parameters
+
+		Colon Parameter Editing Commands
+
+# Image and file name parameters
+
+:image		[string]	Image name
+:output		[string]	Output file name
+
+# Data dependent parameters
+
+:scale		[value]		Image scale (units per pixel)
+:fwhmpsf	[value]		Full width half maximum of psf (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]		Readout noise (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)
+
+# Object detection parameters
+
+:nsigma		[value]		Size of Gaussian kernel (sigma) 
+:threshold	[value]		Detection intensity threshold (counts)
+:ratio		[value]		Sigmay / sigmax of Gaussian kernel
+:theta		[value]		Position angle of Gaussian kernel
+:sharplo	[value]		Lower bound on sharpness
+:sharphi	[value]		Upper bound on sharpness
+:roundlo	[value]		Lower bound on roundness
+:roundhi	[value]		Upper bound on roundness
+
+# Plotting and marking commands
+
+:mkdetections	[y/n]		Mark detections on the image display