Override joins for a railing on a join-by-join basis.
 Mode panel
Mode panel
 Edit Path.
 Edit Path. 
 Tools panel
Tools panel
 Edit Joins.
 Edit Joins. 
A box displays around the join as you move your cursor over it on the path.
Join methods are set by the Angled Joins and Tangent Joins parameters for the railing type. For more information about these parameters and join methods, see Railing System Type Properties.
 Finish Edit Mode.
 Finish Edit Mode.