Oh, I'm dumb, I've completely glazed over that option. Thanks!
On a different note, and to avoid creating additional threads, would it be possible to change the placement of the ion cannon "turret" to a blueprint, to allow it to work from map view with the 1.1 changes to blueprints, and/or to reveal more chunks once the beam goes off? The former is still limited by what chunks have been scanned to not be completely broken (and not fully supplant artillery, which can shoot into undiscovered chunks), while the latter would let us better appreciate the explosion :P
I've also noticed that the ion cannon does not work in Space Exploration's Navigation mode, is this intended behavior on your end?