1. A method for operating a magnetic resonance system comprising the steps of: in a control device that operates a magnetic resonance system to acquire image data from an examination subject representing a diagnostic image of the subject having an image content that allows a medical diagnosis of the examination subject to be made directly therefrom;, manually entering only three first control parameters that define first boundary conditions selected by an operator making the entry, for acquisition of said image data representing said diagnostic image, said first control parameters consisting of a) contrast response, b) spatial orientation of at least one image data set to be acquired representing a diagnostic image of the subject having an image content that allows a medical diagnosis of the examination subject to be made directly therefrom, and c) an organ of the patient from which said image data set is to be acquired; and in a processor in said control unit, automatically determining a plurality of additional, second control parameters that are necessary in order to control operation of said magnetic resonance system configured to acquire said image data, and defining second boundary conditions, using only said first control parameters, and making said second control parameters electronically available at an output of the processor in a form that is useable in operating said magnetic resonance system and in acquiring said image data representing said diagnostic image.