Unreal Engine 4 working on CPU in stead of GPU

When i turn on Unreal Engine 4 it starts using 100% of my CPU even though I have a gtx 1060 which shows only 1% usage that too is by Windows and not Unreal Engine 4 so is there any way to fix this problem

you need to learn the basics of what computer components do. your gpu only deals with rendering things on screen, ie making the pictures. you cpu deals with all the calculations that need to be done, including the processes of opening programs and figuring out what all the code means. the cpu is like the brain of the system.

also when compiling shaders the program will use all of the cpu power available to speed up the process.