You can use connector, vertex, and change tangent controls to adjust the routing of flex pipes.
(Vertex) appears along the length of the flex pipe and allows changing the point where the flex pipe bends. Right-clicking a flex pipe displays a context menu containing options that let you insert or delete a vertex. You use vertices to change the shape of a flex pipe horizontally in a plan view, or vertically in a section or elevation view.
(Change Tangent) appears at the start and end of the flex pipe and allows adjusting the tangent of the first and last bend.
(Connector) appears at each end of the flex pipe to allow repositioning the end of the flex pipe. It allows you to connect or disconnect the flex pipe to another component.