Maybe you can help me - I need a mind mapping tool where I can build a tree not only in top to bottom direction but vice versa. For example I have b=>c=>d and I

Maybe you can help me - I need a mind mapping tool where I can build a tree not only in top to bottom direction but vice versa. For example I have b=>c=>d and I want to get a=>b=>c=>d . I have tried several mind mapping tools but none of them can do it.