Clicking the Call Flow icon shows the currently configured call flows in a tree view format.

Clicking buttons Collapse or Expand, collapses or expands the tree view.

Expand/collapse individual flows by clicking the small arrow in front of the item or right-click to expand that node completely. 

Clicking on a module opens the selected module edit window.

Clicking the Search button or the Enter key in the search field will search in the Call Flow view for a match and expand that tree item. This can be any text in a module or a prompt number.