The zoom control in the key editor seems backwards (at least for a track pad). Other apps that I’m used to (e.g., Logic Pro) swipe up zooms in and swipe down zooms out. In Dorico it is the opposite. The modifiers are also different, but that’s less of an issue.
Turns out the system preferences>trackpad settings>scroll direction natural will reverse the zoom direction, but then you deal with scrolling in browsers is backwards. So… still not happy by this zoom direction in Dorico using the normal trackpad settings.
I remember when this feature was implemented in OS X laptops, the trackpad scroll direction needed to be different for mouse scroll wheel and trackpads.
Zooming in the Key Editor is consistent with zooming in the score itself, which makes sense to me.