starting multi-aperture photometry

Posted by awmeyer on Sep 07, 2013; 6:45am
URL: http://astroimagej.170.s1.nabble.com/starting-multi-aperture-photometry-tp100.html

Just starting to get acquainted with AstroimageJ.  Import a sequence of  FITS images of a star field, astronomy tool button clicked, click multi-aperture, all the options in that menu set to suitable values.  Moving mouse over image I see the several concentric circles in blue centered on a crosshair, representing central aperture and sky annulus.  Left click on a star image, expecting to see a red circle as the manual says, but nothing appears.  And no drawn circle appears after any subsequent clicks elsewhere (manual predicts green circles).  Have tried Image - Overlay - Show Overlay, changing line thickness and colors in Edit - Options, no luck.   Measurements do appear in a "Log" window if I click the mouse center wheel, but no aperture of any color appears whether either mouse button clicked, or wheel clicked.  Only wheel click produces line of measurement data text.
Our FITS images are not visible unless I select Image - Type - 32-bit, then the stack gets re-scaled.  Tried the 16-bit sample image of M51, same result i.e. measurement data text but no drawn apertures where mouse clicked.