This example shows how there are 4 different "step" connection types that can be enabled for Line & Symbol plots: Vertical, Horizontal, Vertical Center, and Horizontal Center. The symbols make it easy to see how each connection type is constructed. Origin includes built-in Vertical Step and Horizontal Step graph templates that are accessible from the Plot menu, Template Library, and 2D Graphs Extended toolbars. Connection type is a property that can be set on the Line tab in Plot Details.
This graph was created by OriginLab Corporation and can be used freely.