Postby Ailurus » Sat Aug 18, 2012 8:53 pm
Hi,
I guess you're talking about changing the curve's appearance by directly dragging sides of the path, instead of dragging the nodes?
When a side doesn't "react" to dragging, check both adjacent nodes for handles. I guess that at least one of the nodes doesn't show the handle(s), but you can fix this by dragging the node while pressing Shift (to be clear, you won't be dragging the node, but make its handle appear). Now the relevant side should react to dragging.
I'm a little confused why this happens, because some sides with nodes that don't show any handles, can be dragged while others cannot...