A method for actuating a magnetic resonance system having a radiofrequency unit designed to generate a radiofrequency pulse for the saturation of nuclear spins in an area under examination of an object under examination. The method includes loading a B0 map of the magnetic resonance system; loading frequency information on nuclear spins to be saturated in the area under examination; ascertaining at least one global RF saturation pulse for the global saturation of the nuclear spins to be saturated on the basis of the B0 map and the frequency information; and outputting the RF saturation pulse via the radiofrequency unit of the magnetic resonance system.