====== How to create a edge (relation) ======

  * Drag from the first node (source) to the second node (target).

If the source node is a **function** node, press and hold ''Ctrl'' key during the drag and drop, otherwise the target will be connected not by relation, but as a new function argument.

Do not drag and drop from/to the attribute controls, use ID or the concept text (the green part) instead:
{{ :projects:content-annotation:tools:annotation-tool:nodedrag.png |Use only the green part of concept for drag and drop operations!}}