photoshop histogram broken troubleshooting

[HollySprings]

When I first open Photoshop, the histogram displays a circle with a diagonal slash through it.

When I load a photo, with the histogram set on colors:

a) has a strange dark green/dark grey color, among the other colors;

b) will not allow me to edit the photo with the histogram.

Any ideas?

Bill Fant

[c.pfaffenbichler]

Could you please post screenshots with the pertinent Panels (Toolbar, Layers, Histogram, Options Bar, …) visible? 

[PECourtejoie · Accepted solution]

Hello, You might mistake Camera Raw's histogram with Photoshop's: there is no image editing abilities built in Photoshop's version.

The colors are not the same as in Camera Raw.

[gaurav wagh]

Photo editing