Use this procedure to reposition dynamic posts to account for posts that have been added or removed. You cannot redistribute displayed posts to account for hidden posts.
You may also want to redistribute posts after dragging the endpoints (start and end offset) of a railing attached to a stair. If posts are lost after trimming a railing, use the Redistribute Posts command to restore the posts.
If you have created a railing that is so short that only one post can be created, grip-editing and dragging the railing does not create another post. You must use the Redistribute Posts command to add another post to the end of the railing.