Presently if I create overlay that is sticking outsize of the window it is cutoff. How can I configure it so if say my overlay is longer then space below trigger it will increase body height so i can scroll to the bottom of overlay.

Presently if I create overlay that is sticking outsize of the window it is cutoff. How can I configure it so if say my overlay is longer then space below trigger it will increase body height so i can scroll to the bottom of overlay.
