Sorry for the delay in response, been out of pocket. I click the "ok" button, bottom right, of the iptc info window, which closes the window and saves my edits, but then the preview window immediately opens up of its own accord. As a test, I also just now tried clicking the close window button (top left, the little red button available on most Mac windows), and that also triggered opening of the preview window. If I open iptc info and then close without making any edits, the preview window does NOT open. Or if I make very minimal edits, like just adding one period for instance, preview does not open. I haven't tested to figure out if there's a certain number of edits or characters required before preview is triggered.