right but i am using a macOS laptop (discretely points to topic title). i have a touch pad, so mouse wheel and middle button all don't exist; the documentation for the key bindings for mac-os are stingy and require digging to find.
ctrl+two-finger-drag on the track pad zooms in and out, preserving orbit focus. I had been using two-finger + w or s to zoom in and out because that's what presented in the documentation. These I suspect are 'free-look' and using them takes the editor out of orbiting. Life is good now.
I recognize a bit of teething pain is always in order, however ux 'discovery' is not a godot strong point