The Lighting Controller Classic

Could you make a right click option when multiple fixtures are selected to move them to a new universe number?

Currently, fixtures have to be done one by one and it's time consuming. I assume an error would be thrown if there's an address conflict and it would stop the move.

Noted, but low priority level than other requested things, in our opinion.

In the meantime, for multi-addressing change, you can save time by editing the file "../YourLightshow/fixtures.ini" and changing the parameter "address".
For instance, if you change

[Fixture1]
address = 1

to

[Fixture1]
address = 513

The fixture will have the new DMX address "1" of the second DMX universe.

In case of, please make a safe copy of the original file "fixtures.ini" before trying that.