I - Insert the parameters for a new component
	Possibilities
		linear,  powerlaw, bp1, bb,
		gaussian, logarith, labsorp, eabsorp,
		recomb, extinc, usercont, userline, 
		userabs, lorentz, dampabs, logabs, 
		tauabs, ffree, extdrude
S - Subtract (Delete) a component
G - List the component numbers and names
a - Change the tolerance on a parameter
c - Change the value of a parameter
e - Evaluate the current Chi-square
f - Minimize using the Simplex algorithm
m - Minimize using the Marquadt algorithm
n - Minimize using a Numrecipes routine (usually most effective method)
i - Print information on a parameter
l - Change the lower limit
p - Overplot the fit on the data
o - Specify which components to overplot
q - Exit from SPECFIT
r - Re-plot the data
s - Select new sample ranges
t - Change the maximum number of iterations
u - Change the upper limit
x - Change the fix or free status
z - Change the step size
d - Plot the distribution of Chi-square
- - Plot the residual spectrum
+ - Plot the model alone
w - Window the graph
? - Print this help menu
: - Issue an IRAF colon command
  - (space) Print current cursor position