Why is the View=> Flip Horizontal Greyed out ????

[Joelchristiangill]

I have no issue with I rest the setting and I clip UPG and unclicked it. I changed the file from 8 to 16 and then to 32 and still nothing.  Anyone have ideas?

[c.pfaffenbichler]

»I have no issue with I rest the setting and I clip UPG and unclicked it. «

I assume you mean GPU. Did you restart Photoshop to let the setting take effect? 

Is »Use Graphics Processor« checked and active now?