Try Visual Assist X (also known as VAX by in the Unreal Engine 4 documentation) for better intellisense in C++. It’s not free, but I feel it’s a must-have if you’re serious about exploring a large codebase. It has better auto-complete, better syntax highlighting, the ability to switch between a .cpp and a .h for a class with a keypress (you have to setup shortcuts yourself in Visual Studio), and if you press ‘.’ at the end of a pointer, it’ll automatically turn it into a ‘->’. There are a lot of other features, but those are just a few off the top of my head. I suggest you try the trial and see how it works out for you.