ue4 support combine baked-shadow far away camera and dynamic-shadow near camera automatically inside

ue4 support combine baked-shadow far away camera and dynamic-shadow near camera automatically inside the engine?
how to use it? 1st, bake shadow for the whole scene, and then what should be set to make near the camera use dynamic shadow, further combine dynamic and baked shadow, further more totoally use baked shadow.
thanks!