I’ll be a little bit more specific about what I did. I’m modifying the InertialScrollManager.h which means that any module which includes it will have to also be recompiled. When I rightclicked the UE4 Project in MSVS’s Solution Explorer and hit “Build,” it compiled around 500 modules (which seems a bit much for just the inertial scroll manager). The compile took more than 2 hours on mid-high tier computer. Which begs the question: is everything being recompiled? Is this wait time normal or am I just being impatient? If my procedure is incorrect, could you describe the appropriate workflow for what I want to do? I’d greatly appreciate it. 