Visualizing (list of sequential steps) as groups, as part of one stage

The pipeline view of Blue Ocean makes a great deal in listing a block of parallel steps by just displaying different boxes under each other. This seems to work only for parallel steps defined in one stage. If I add different build steps to a stage, operated sequentielly, the visualizing only displys one box for the entire stage. It would be helpful to express a group of steps, as part of the stage, processed sequentially, but shown as dedicated boxed (one group of steps in one box, the stage comprises a set of sequential groups of sequential steps).