currently the up and down arrow keys don't do anything I think (?)
it would be handy to be able to nudge selected operator tiles up or down.
at present, the left and right arrow keys pause the timeline and jump to next or previous frame.
It would be cool if they only did that when the timeline is paused but otherwise were used for nudging Ops left or right in the network editor. I find this very useful in using PureData to just tidy things up in a netowrk.