Keystroke Commands 

?	Print help
p	Print photometry for star nearest the cursor
l	List the current psf stars
n	Select the next good candidate psf star from the list
a	Add star nearest cursor to psf star list
d	Delete psf star nearest cursor from psf star list
q	Quit task

	Colon Commands

:p [n]	Print photometry for star n
:a [n]	Add star n to psf star list
:d [n]	Delete star n from psf star list