Helpo de LibreOffice 7.5
In a chart that displays lines (Line type or XY type), you can choose to connect the points with steps instead of straight lines. Some options control the properties of those steps.
Start with horizontal line and step up vertically at the end.
Start to step up vertically and end with horizontal line.
Start with horizontal line, step up vertically in the middle of the X values and end with horizontal line.
Start to step up vertically to the middle of the Y values, draw a horizontal line and finish by stepping vertically to the end.