How to adjust insert point of a pier?

Hi,

I have a question concerning the inserting point (WP) of a pier.

As far as i can see, it's only possible to insert the pier directly under the main alignment. I'm missing the possibility to offset the inserting point.

In my current project I have a bridge slab where the intersection between the main alignment and the pierline does not intersect in the center of the bridge slab. To level the slab load equally, I want to offset the pier, but how ?

Thanks in advance.

Ole Bro