Dialogic 1.X- Dialogue Button Position

[PuteraSinuraya]

The default location of the choice button is in the center of screen. However, when I change the location of the dialogue button to.. say, Center_right, parts of the dialogue box is cut off. No matter what I do, I can't seem to change the value of the anchor of the Vboxcontainer of the buttons.

Any help would be appreciated.