Brightness/Contrast Option Grayed out

[jimlolo]

I have a TIFF file uploaded to Photoshop. I'm trying to adjust the brightness/contrast via Image>Adjustments, and via a new adjustment layer, but that option brightness/contrast is grayed out. Levels and Exposure work. Any ideas why?

Thanks.

[c.pfaffenbichler]

What are the image’s Color Mode and bit depth? 

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

[jimlolo]

Don't know the bit depth is 96.

[TheDigitalDog]

I'll bet you have a 32-bit document here which is why they are grayed out. Go into menu Image>Mode; what does it show for bit depth? If 32-bit, that's why. You'll have to convert to 16-bit (or 8) to use those adjustments.

[jimlolo]

Yep, 32-bit. What's the best way to convert to 16 if I can't change the original rendering to 16?

[TheDigitalDog]

Just use that Mode menu option and select 16-bit. 

[jimlolo]

It gave me a funky image. Will play with it.

[c.pfaffenbichler]

Image > Mode > 16 Bits/Channel

[c.pfaffenbichler]

Could you please post a meaningful screenshot? 

Edit: Ah, I assume you mean RGB 32bit.