Actors and relations can easily be added by only using the mouse on the surface of YSOCNET. Pressing the mouse once and short adds a new actor to the scene. To remove an actor, activate the actor by clicking on it. Then use the menu associated with the right mouse button, and select delete.
To add an relation between 2 actors, click at the source actor, hold the mouse button, and drag it to the target actor. A new relation will be added. Every added relation will have the value 1. To change the value, use the MatrixModule.