This isnt a perfect answer to your question, but the easiest way to do this is to invert either the pan or tilt for one of the fixtures.

I propose clicking the right hand one, press "patch"; "patch utilities"; "invert" and then "pan" will acomplish this for you.

James

I would like to know how to swap many playbacks at once. For example, if a group of fixtures are performing a specified movement and a specified colour chase at once, I would like to change both of these at once. i.e, set up the change while the first group is running and then apply all the changes ...