To control turbulence spreading, we will first establish good QH-mode conditions and then obtain wide-pedestal QH-mode transition by applying NBI torque ramp down. As has been shown by gyrokinetic simulations that ExB shear affects the turbulence spreading extent, we will use DIII-D’s unique rotation control techniques e.g. neutral beams and 3D coils to affect the edge toroidal rotation and ExB profiles. We will then measure the effects of various levels of ExB shear on turbulence spreading using fluctuation diagnostics which can estimate the turbulence intensity flux. The effect of turbulence spreading on background profiles will be then measured using different profile diagnostics of DIII-D.