How do I force photometry on dimmer of two closely spaced stars

Posted by Phil Evans on Feb 12, 2017; 8:19pm
URL: http://astroimagej.170.s1.nabble.com/How-do-I-force-photometry-on-dimmer-of-two-closely-spaced-stars-tp614.html

How can I force the photometry aperture to remain on the dimmer of two very closely spaced, but resolved, stars?
As soon as I start the run the aperture jumps to the brighter one.