Why isn't the perspective slider functioning in the 3D and Materials panel?

[rditty]

In my 3D and materials panel the perspective slider doesn't work. It isn't grayed out but the slider won't move and I can't input a number into the box on the right either. Does anyone know why that might be the case?

[rditty · Accepted solution]

It's working now. I had restarted the program and my macbook but it was still frozen. However, for some reason, after I clicked through the other panels (materials and lighting) and came back to "object" it started working. It must just be a weird glitch. 

[Sam5F84]

Just had the same thing happen to me. Completely unresponsive until I clicked on the other 3D tabs. So weird. Thanks for the tip.

[Olaf5E19]

Year later and it's still the case. Thanks for the tip it works!