I see my integrated graphics card listed when I go to 'About this Mac'.
Macbook Pro
15-inch, Mid 2012
OS X El Capitan
Processor 2.3GHz Intel Core i7
Memory 16GB
Graphics Intel HD Graphics 4000 1024 MB
500GB SATA hard drive
But what is the deal with my NVIDIA dedicated graphics card? Can I make it my primary and the integrated Intel HD Graphics secondary? How do I know if it's being utilized when I watch movies or play games?