Technically, it is only required to select a layer (yellow rim) and then press the right mouse button and select “Save property as grid” in order to export displayed values to a file. In 3D view, however, only the content of the shallowest/youngest layer is saved if more than one layer is selected at the same time. In this multi-selection case a re-selection of only one layer has to be done to pick the desired horizon and export its properties.
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