Is it possible to keep nods in the user defiend position?

I came across the GitHub project (https://github.com/wanglin2/mind-map). it's very cool.. but when I try to include more than 20 nodes in the root node the mind map cannot fit into the page. I am trying to export it as png and include it in the PowerPoint presentation but it is difficult to do it with auto position.. is it possible to mode nodes freely to rearrange the nodes so that I could use this code in my project?