I'm having a problem in wanting to view the histogram of the images that I'm taking in the fits viewer. I want to just see what the histogram looks like to check the levels to ensure that I'm using the right gain & offset values for my camera. There is a histogram icon in the top menu bar and when I click it, I get something like this:
I know that I'm showing my ignorance here, but this histogram doesn't look anything remotely like what I get when I load the image into something like GIMP or Photoshop. Also, if I click the "Apply" button, it really messes the image up. Could someone explain to me how to get a histogram like what is shown when you open the page for the FITS viewer tool page:
For me, I can't even open the side panel.