# Why can i change this.Private root
**Please do not edit**
This seems weird.⏎⏎is the top parent node for all private projects ("knowledge trees", or graphs"). After being created, a private project can be only viewed and modified by the person who created it. He/she can invite collaborators, who will have the same rights to view and edit as the creator. If desired, Private projects can be merged with other private projects (list of collaborators merge as well), made publicly visible (by adding a public parent to the top node of private project), or made completely public (detach from Private root).
Every user can have any number of private projects.
For the ideas how to build hierarchical knowledge graphs please refer to the description in [Public root](http://knowen.org/nodes/1).
If you are new to knowen please refer to the [videos on the basic functionality](http://knowen.org/nodes/971).
* FOA: [FOA](https://nsf.gov/funding/pgm_summ.jsp?pims_id=503214&org=NSF&sel_org=NSFW&from=fund)
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