How to move an object without attached objects moving along?

[christian ridderstrom gmail com]

I often connect lines to the connection points of say boxes. Normally when 
you move the box, the end-point of a connect lines move withs the box.

Is there some way to move the box without having the end-point of the line 
moving with the box?  Or is there some way to have all connected objecst 
disconnect in one operation?

Btw, in MATLAB/Simulink, if you move an object by using the middle mouse 
button, connected lines are not moved with the object. In Dia the middle 
mouse button lets you scroll the diagram, so I guess that's not an option 
here. But maybe holding down a key and moving an object could achieve 
this?

/Christian

--
Christian Ridderström, +46-8-768 39 44               http://www.md.kth.se/~chr