Vertical Menu

Hi

We love the canvas theme and have used it now few times, we are setting up a new website and were hoping to make a vertical menu which would have a sub menu displayed, when clicked, to the right of the main menu. I have tried using the nav tree menu on the side menu but i cant get it to display the sub menu at the side rather than a dropdown underneath.

Please can you let me know if there is any way round this.

Kind regards

Lorraine