A method, performed by a computer system, for designing a multi-physics system including the steps of displaying a block diagram representation of the multi-physics system, including blocks that each correspond to a respective sub-system of the multi-physics system, and, between the blocks, links that correspond to multi-physics connections between the respective sub-systems, and upon a zoom command, sent by a user, displaying a preview of a block diagram representation of at least one respective sub-system, the displaying of the preview being controlled by the detection, by the computer system, of the zoom command. Such a method improves the design of a 3D modeled object.
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