How to view your FITS files Discipline: Education Once you have DS9 open, go to File>Open and then choose one of the FITS files you downloaded. You will then see a screen with no obvious image and mostly black. DS9 is displaying the full range of pixel values in the image, from 0 to 65,000. In order to make the image more visible, use the Scale option from the menu bar. Tags: FITSds9scalehistogram
