Brent,
This is definitely up there on the wishlist, but for now if you want a different arc/arc position (when placing an adjustable head), you will need to remove the head (and if piped, both segments of pipe connecting the head) and place again.
If you are trying to place a different fixed arc nozzle, you should be able to accomplish this with the
Mimic Equipment Tool
Please let us know if there is anything else and we would be happy to discuss.
Cheers,