In order to enable horizontal scroll bar set showXScroll to BALKANGraph.scroll.visible. Aslo you have an option to use the mouse scroll set mouseScroolBehaviour to BALKANGrapth.action.xScroll. Here is an example:
Now set the showYScroll to BALKANGraph.scroll.visible and chage mouseScroolBehaviour to BALKANGrapth.action.yScroll
Pan/move, left-click and hold mouse button in the OrgChart JS and drag the mouse in any direction. You cannot disable the Pan navigation.
Chage mouseScroolBehaviour to BALKANGraph.action.zoom. Here is the result: