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Hello, I'm hoping somebody can shed some light on this. I'm trying to edit an astro stack, however when I apply a curves adjustment, (manually or adjusting the automatically applied one during the stack) there is either no or very little histrogram data, despite the standard histogram working as normal, and other adjustments such as levels working fine too. While the master selection in curves isn't working, the red green and blue are, as well as grey and so on. I have a pretty decent Windows machine so performance isn't an issue. I thought it may take a short while for the histogram to render in but it never does. Funnily enough, I downloaded a sample stack online of the same subject, same document settings (32 bit etc), and it seemed to work on that image, so I'm at a loss. Any help would be appreciated. I've attached screenshots and my project file for reference. Thanks 452161177_TestStack.afphoto

Please excuse if this feature has been discussed, as search did not reveal topic. May I suggest when you select the Crop tool, and drag the tool to determine desired size, the Histogram updates to reflect the black, shadows and white level. I do realize that you can do level and other adjustments post crop; however, I think this could provide users a 2 for 1 tool.