Moving nodes with constraints

 

You can have mouse-based dragging of nodes be constrained horizontally, vertically, or not at all.

1. Choose Settings from the Options menu.

   A Settings dialog appears.

2. Pick the desired choice from the Constraint Type popup menu.

   The Horizontal choice causes node movement to be only vertical; the Vertical choice causes node movement to be only horizontal; the None choice allows free movement.

   

3. Click Done to dismiss the dialog.
4. Drag the node(s) as desired.